Topic: HELP.. bitcoin transfer between my wallets big problem (Read 630 times)

Hello to HCP and LoyceV

Good news - they did it!.. .1 short update midweek to say 1.25BTC are back in my account!.. a relief and/tho I can hardly believe it took that long.

I want to come good on my initial offer split between you both however I am going to adjust it by the loss in bitcoin price since the 5th January high.. I posted on the 3rd, and now so in 4 it has gone from $16,800 to $7,320 now so in effect I'd like to send you each 0.03BTC

however, given charges on BTC, It is I think better  to give it as the equivalent when I change it in ETH... tell me if you disagree

You've both been really helpful and I trust this adjustment makes sense - not that it is in the least bit your fault it took so long of course

not sure how you safely send me a receiving address but you will know

timbo

oops.. thanks on the name, now removed.  I will keep you posted, thankyou both for your help, Tim

You've posted your last name in twice in your last post (again). You may want to remove that.

Keep us posted if you ever get through to them.

Thanks LoyceV , HCP.

based on your suggestion I propose to post this and am putting it here (without keys) incase you recommend changes but I think it is about right.  I agree to checking out twitter / regular updates or new posts if this does not work in a week or 2

"
Hello David C,

"the other party" I sent to is YOU (Coinbase), and by contacting you I did exactly what you recommend. To save time I have copied below my post update of 6th Jan (2 months ago!) giving full details. Can you please forward this matter to someone who  has the authority to credit my account with the 1.25 Bitcoin I accidentally sent to YOU - as soon as possible?

Also note below and in this thread I was told on 16th Jan it was already in the hands of a specialist so can you investigate or re-open their checks?

COPIED FROM THREAD>
"
Txxxx
Jan 06, 2018 07:01AM
I can now prove it was me that sent this to you - Here is a signed message that (if I did it correctly) should show the address FROM which I sent 1.25 BTC to the above address:

Message:
Hello Coinbase Support - this is Txxx, email xxxxxxxxx. Thi is a signature that shows the address I mistakenly sent 1.25BTC to your address: xxxxxxxxx from. I am writing to prove to you that it was ME that sent this so you can please re-allocate it to my Coinbase Wallet. The Transaction ID was xxxxxxxxxxxxxxxx

Signature:
xxxxxxxxxx
"

NOTE.. .this was sent FROM this address since I had received from Coinbase this address ending wKMM on July 31 2017 @ 04:47 PM 1.75BTC.... this may help you confirm my Coinbase wallet. I'm updating this ticket not creating a new one since you say it is quicker. I hope it does not mean I'm not at the back of the queue

COPIED FROM THREAD> extract from reply from your Darren C (received on 16th January)
"
...Having investigated the issue, I am working with a specialist to address it properly. We will follow-up with you as soon as we have an update....
"

"

TL;DR - "new" Coinbase support drone copy/pasted from the "sent coin to wrong address" template

*sigh*... Situations like this really highlight why putting coins in wallets for which you don't have access to the private keys, is fraught with danger   If anything goes wrong, you're reliant on "minimum wage" support staff who probably have like 1000 support tickets per day to deal with

Given the amount of money these services are making, they really need to start investing in "proper" support infrastructure and customer service.

Honestly, at this point, I would consider sending "weekly" queries to prevent it from being buried and then assigned to yet another support drone who will likely copy/paste the same reply.

Here I would respond with something like:

---

"Dear David, "the other party" is YOU (Coinbase), and by contacting you I did exactly what you recommend. Can you please forward this matter to someone who thoroughly reads my request, and has the authority to credit my account with the 1.25 Bitcoin I accidentally sent?"

---

You'll have to get through the first later of "support", assuming there is a next layer that can actually solve problems. From my experience with other support lines, I'd say you should just keep trying.
My offer still stands: PM me your complete message, including all addresses and signed messages. I'll check if it all checks out, and see if I can improve anything to make it clearer.

Ideally, you should talk to them on the phone, but I guess they don't offer that option. Twitter may be an option: many companies respond faster when their public image is at stake. But here too: make sure it's a clear and complete message which they quickly an verify.

I feel your pain "Support" can be so difficult to get through to.
It took me some time too, to get through this thread again and know the details again. A support employee doesn't have that time.

Hi LoyceV, HCP,

It's been too long - as an update, Coinbase said on Jan 16 that:
Having investigated the issue, I am working with a specialist to address it properly. We will follow-up with you as soon as we have an update.... Darren

On Jan 21st I wrote a 1 line chaser:
Hi Darren, I hope it is ok to ask - do you have an estimated timescale for when you might know more on this?

On Feb 16th I sent another chaser:
Hello Darren, I've not heard from you on this now for 1 month. I understand you must be very busy but can you please give me some update on timescales for this specialist support case

On 5th March I got:
David C
Mar 04, 2018 03:30PM
I’m sorry to hear about the trouble.

Unfortunately, due to the irreversible nature of most digital currencies, transactions cannot be cancelled or reversed once sent. You will need to contact the party you sent to and seek their cooperation in this matter. If you do not know the owner of the address in question, I’m afraid there are no available actions to take to retrieve your funds.

If the transaction was sent to an incorrect or invalid email address, after 30 days, any coins that have not been claimed by the recipient by signing up with that email address will automatically be returned to the sender. This means that you should receive your lost transaction 30 days from the send date if it is not claimed. If it has been more than 30 days, we are aware of the issue and working to return these funds as quickly as possible.

SO>>>>>>>
This is almost identical to my initial reply on Jan 6th
Unfortunately, digital currency transactions using most blockchains are irreversible, meaning once they are sent there is no way to reclaim funds.

If you sent digital currency from your Coinbase account to an email address by accident, your funds will be returned to you in 30 days if the funds remain unclaimed. If the email address has not already been claimed, you could do so to ensure the funds are returned to you.

So actions>>>>>>>>
Obviously this is another guy and he has not read the thread.... did I make a mistake by chasing after 1 week and 1 month ?... this is obviously very hard to know how to play given their low attention span
1) new thread from scratch
2) reply to this with full details
3) having done so.... wait longer without chasing...

I am keen to hear your views and will wait to get your best views before acting

Thanks for being there!

That looks good indeed, and it makes sense the helpdesk guy doesn't have the authority to credit your account with such a high amount.

I used Coinomi for both. I created a QR-code for the private key to sweep both chains, but you could also just type it.

After exporting your private key, never ever use the same address again to receive Bitcoin.

There are more forks to claim, I'm still working on my "LoyceV's Bitcoin Fork claiming guide (and service)"-thread.

Hi HCP & LoyceV,

I got some encouraging news from Coinbase yesterday:

Thank you for your reply and apologies for the trouble here.
Having investigated the issue, I am working with a specialist to address it properly. We will follow-up with you as soon as we have an update.

So fingers crossed - there seems to be willingness.

Separately, (LoyceV?), Since yo suggested it can you advice the best way to claim my bitcoin gold and the airdroped bitcore

I found these posts

BTG https://bitcoinmagazine.com/articles/beginners-guide-claiming-your-bitcoin-gold-and-selling-it/

airdropped bitcore...  https://steemit.com/bitcoin/@imineblocks/how-to-claim-free-bitcore-coins-via-airdrop-sign-bitcoin-message-using-wallet

if there is anything to add to me just using them and I guess Electrum let me know?

Thanks, Tim

I understand Coinbase uses its own addresses (rather than individual user addresses) so as to be able to aggregate transactions and thereby reduce transaction costs. But the address should be under their control, so my suggestion would be to contact them. Was the address that sent you the coins 1 address with a very high balance? If so, it's likely to be one of Coinbase's own addresses, and in that case they should be able to give you back your coins (if they're willing to do so).Another possibility is that Coinbase sends funds from other user's deposit addresses. If that's the case, your funds were credited to someone else's account, and in that case it's unlikely they can give it back to you.
It depends on the way Coinbase handles withdrawals.

Thanks HCP

I Sent the new ticket since the wording was better than mine and it was now 7 days since I'd updated it.  it is likely they will get to the update first but as you say, they may prioritise new tickets. 

could certainly go either way but I thought a totally crisp explanation may help and that in the event the update request was not approved, it gives a chance for a new person to take a new view

we will see

more soon I hope!

Tim

If it helps... my (take it with a grain of salt) 2nd opinion is that LoyceV's email was pretty much "on the money" for the sort of thing you need to send to most exchange support "Heroes"

You need to keep it short, to the point and contain all the relevant info. If you make it too long, chances are they'll ignore it... if you make it too short, they won't understand what the problem is. If you don't include all the pertinent info, they'll respond with "send more info"... and then ignore your ticket for another 3 weeks.

Also, sending new tickets is, in most cases, counter-productive. It just creates extra work for support teams (which they really don't need)... and may mean that you get two different people working on the same issue who end up stepping on each others toes while trying to help.


As for the green and red transactions... your coins went in and were then likely collated into a holding address or moved to cold storage by coinbase... or used to pay someone elses withdraw request. Ignore everything that happened to them AFTER the your transaction, it is unimportant to you. The important thing is that you sent X BTC to an incorrect address at Coinbase. They should credit that much to your account.

Thankyou, I understand, I will

It's entirely up to you. At worst, a txid can be used to tie a certain transaction to you. In other words: it compromises your privacy (a bit).
In general, posting your full name and email address does more damage to your privacy. Any transaction you can find on blockchain.info's block explorer is public knowledge, it just doesn't say who owns which address.
It doesn't hurt to be careful with data though, in fact, I consider it to be a good thing to be (almost) paranoid when it comes to Bitcoin. For the future, it doesn't hurt to know a bit more about how Bitcoin works either.

I'm curious to see if Coinbase helps you out now, so please post back here.

Thanks LoyceV

I posted it now.  You have been very helpful, but as I said, I do not understand blockchain enough to trust that, if I sent you by PM the signature / addresses / transaction ID's etc to check, you would not be able to use it 'against' me.

This is just me being cautious, you've done nothing but help a lot, and I hope this work so I can repay both you and HCP

my email removed.. thanks for pointing that out

Tim

If you PM me the txids, I'll check them.

I suggest to edit your personal information out of this public post.

Thanks LoyceV

Here is my message.. basically not referring to the other ticket at all and using your message.  I'm afraid I don't understand blockchain enough to include all the id's in this post or to you - I hope that is ok and you will understand.  I'm confident the codes are correct.  Any changes suggested?... hopefully not going through creating a new signed message!!

Timbo55


In July 2017, I withdrew 1.75 BTC from Coinbase to my wallet (Blockchain.info) with txid: xxx

Last week, on January 1st, I wanted to deposit 1.25 BTC to Coinbase. But, instead of sending it to my own deposit address, I returned it to xxxKMM, which is the address Coinbase used to send me 1.75 BTC last July.
I now know this is a mistake, and it can only be fixed by your manual intervention. Can you please credit the 1.25 BTC to my account?.  Here is a signed message as proof I sent it to you myself:

Message:
Hello Coinbase Support - this is Timbo55, email . Thi is a signature that shows the address I mistakenly sent 1.25BTC to your address: xxKMM from. I am writing to prove to you that it was ME that sent this so you can please re-allocate it to my Coinbase Wallet. The Transaction ID was xxx

Signature:
xxx

Sorry for the inconvenience, and thank you for your time,

Tim

Use my "business like" example, send that. Feel free to PM me your final message including all txids and signed message before sending it to Coinbase if you want me to review it.

On blockchain.info, transactions received by the address are GREEN, transactions sent from that address are RED.

Hi LoyceV, HCP,

No answer so I am composing a new message. they will likely get to reply but I thought a new ticket may have higher priority.  I plan not to refer to the existing ticket

 You suggested telling them the original transaction ID where I sent it FROM coinbase to b.info.  looking on b.info it seems for this and all transactions, there are 2 stages,

My 1.75 went to the address I recorded as it coming from ending KMM ... GREEN

The same amount went a few hours later from that address to 2 others RED

Am I right the original GREEN one is my transaction and the 2nd is some sort of reconciliation?

with my 1.25BTC there is  the same thing... I sent it at 21:50pm to the ..KMM address .. GREEN

10 minutes later in RED it went to 2 other from KMM

I'm trying t o confirm that the first 1.75 transaction is my transaction ID to quote them ?

Many thanks, Tim

Thanks LoyceV,

I agree yours is better - i await eagerly seeing if/that my wording worked

I've totally got Bitcoin Cash.

I'm aware I've got Bitcoin Gold but it is not available on the coinbase / b.info exchanges yet

not heard of Airdropped bitcore at all.

I'm setting up with Binance and am on Kucoins now so presumably that helps me access them?

Tim

In my experience, nobody ever reads, so keeping it short and businesslike can help.

On a slightly related subject: have you already claimed your forked Bitcoin Cash and Bitcoin Gold and airdropped Bitcore? If not, it'll be worth your time to check.

Hello LoyceV

I wrote the below.  Yours is more businesslike but I hope if there is any openness there, this should work... (open to comment)

Hello Darren (?) and thanks for replying. I can see my first post was about possibly reversing a transaction but I quickly learnt as you say that is not possible.

My post update of Jan 06, 2018 07:01AM (I guess with the crazy number of tickets you face this was not read) is nothing to do with reversing, it is proving that I sent the funds to an address that 'belongs' to coinbase but is not allocated to any one person. The request is not to reverse but to
a) do some checking to confirm that 1.25BTC is sitting on the address xx .. within the control of Coinbase
b) check my proof from a signature / transaction ID that this was sent by me
c) send it from this unallocated to a person address to my personal coinbase address

You will appreciate 1.25BTC is a huge amount of money and I hope you will see it is the right thing to do in this case to do the above - if there is more I can or should do to help you do so let me know

Your messages to Coinbase aren't very clear. When you started this tread, you wrote this:

Allow me to rewrite your messages (removing irrelevant information), correct me if/where I'm wrong, and feel free to send it to Coinbase:

---

Dear Coinbase,

Thank you for your reply, but unfortunately it's not what I need. I'll try to explain it again:

In July 2017, I withdrew 1.75 BTC from Coinbase to my wallet, txid: .
Last week, on January 1st, I wanted to deposit 1.25 BTC to Coinbase. But, instead of sending it to my own deposit address, I returned it to

, which is the address Coinbase used to send me 1.75 BTC last July. I now know this is a mistake, and it can only be fixed by your manual intervention. Can you please credit the 1.25 BTC to my account?



Sorry for the inconvenience, and thank you for your time,
timbo555

---

Yes... what I wrote was

1st post
I am with you and coinbase. In July I sent them 1.75 BTC. When it arrived THERE it had the above Hash showing. 9:50pm UK time 1st Jan I sent 1.25 BTC BACK to you but I used this code, thinking it was my Coinbase address... I now see it is a public hash number that changes and not the address. I am HORRIFIED... please help me reclaim this for a reward in BTC

8 hours later
To confirm the address I sent TO was xxxx
I'm told through a forum that you must control the private key to this address in order to make it the public facing sent from - so I believe it may be in your power to connect my send back to my account?

yesterday:
I can now prove it was me that sent this to you - Here is a signed message that (if I did it correctly) should show the address FROM which I sent 1.25 BTC to the above address:

Message:
Hello Coinbase Support - this is Timbo xxx, email xxx. This is a signature that shows the address I mistakenly sent 1.25BTC to your address: xxx from. I am writing to prove to you that it was ME that sent this so you can please re-allocate it to my Coinbase Wallet. The Transaction ID was xxx

Signature:
xxx

NOTE.. .this was sent FROM this address since I had received from Coinbase this address ending xxx on July 31 2017 @ 04:47 PM 1.75BTC.... this may help you confirm my Coinbase wallet. I'm updating this ticket not creating a new one since you say it is quicker. I hope it does not mean I'm not at the back of the queue


So if he only read the 1st post it is more forgivable

I'll write in an hour with a reply to his and a new post... any thoughts welcome, Tim

Support 101: Click auto-reply #26 without reading the actual question the customer sent you.

At this point I would start with: "please read what I wrote to you", but it might help to stay a bit more friendly to get their support
"Thank you for your answer, unfortunately it's not what I asked" might do. What exactly did you write to support? Feel free to leave out any personal information (addresses and signatures).

Thankyou LoyceV and HCP again... an update... not pretty..

Hello there,
Thank you for contacting Coinbase and apologies for the trouble here.
Unfortunately, digital currency transactions using most blockchains are irreversible, meaning once they are sent there is no way to reclaim funds.
If you sent digital currency from your Coinbase account to an email address by accident, your funds will be returned to you in 30 days if the funds remain unclaimed. If the email address has not already been claimed, you could do so to ensure the funds are returned to you.
I hope this information helps.

Apart from being very shaken by this I think he is missing the point - I've not asked them to reverse but to re-allocate.  Also there is no mention here they have read the parts of my post about proving..

Any further thoughts / tips before I respond?

I'll do so on a new ticket and an update to hopefully ensure it gets read again

Tim

It depends... I work shifts... so my "online" time is an always changing window



Thanks guys... just trying to help out fellow BCTalkers

ps. LoyceV was on the money with the answers

Thankyou LoyceV, I guess HCP is from down under.. he does not reply at this time of day!

Sounds good then and I'm basically now waiting for coinbase.  Any tactics for getting them to reply (4 days now) or comments for past cases of their track record in allocating my BTC gratefully received

Re my Electrum Wallet - for security I presume I'm better to send the small amount of money I had in it to coinbase and then delete the 'program' - presumably that removes the slight security risk (tho I have a decent password on electrum anyway)

Timbo

You don't mind if I jump in, do you?

You can sign a message without encrypting your wallet.

You've duplicated your wallet, and can access your funds from both blockchain.info as well as your local Electrum.

You can still set a password in Electrum.

Correct.

That's your own change address, also correct.

I think you did everything correct.
Technically, each time you import a private key (or seed), you reduce the security a bit. As always, it mainly depends on how secure your computer is, if it's compromised, neither one (online or local wallet) is safe.

HCP is very resourceful, I've noticed that before

OK HCP

Progress at last I believe and some check questions:
1) I used my recovery phrase in Electrum.  It asked if I wanted  to encrypt and I did not .. thought that might make the address not work for signature.  It found and downloaded all transactions from B.info.  this is impressive but
1a) does this mean my wallet is now in 2 places and could be spent from electrum or b.info ?
1b) I'm worried I did not encrypt as above - how can / should I resolve this... perhaps now delete the electrum wallet ?

2) with all transactions I was able to find the -1.25 BTC one It showed in details
a)a Transaction ID  (I included in my signed message)
b) an input address ... this matched one of the imported wallet addresses so I presume THIS is the one I sent from and put this in the signature address box.
c)2 outputs... the one I sent to (general coinbase unallocated to me... had 1250 against it )... and one in yellow with the remaining balance of BTC (499 or 0.5)

I updated the support ticket with a message and the signature of the address.

So... does this make sense / did I do right / any comments esp re the import security in 1 above ?

HCP - I reiterate you have been great and I want to reward this if/when I get my BTC back

1) No, not as part of a transaction. You create a new wallet ("File -> New\Restore -> Import Bitcoin Addresses or Private Keys")... paste in the private key, you should get a wallet with a single address (it should match the address your coins were sent FROM)...

Alternatively, and probably easier, you can just import your entire 12 word b.info recovery phrase ("File -> New\Restore -> Standard Wallet -> I already have a seed -> Click "Options", select "BIP39 Seed" -> Enter Seed -> leave the derivation path as m/44'/0'/0')

That will import your entire b.info wallet into Electrum.

Either way, you then select "Tools -> sign/verify message", type your message at the top (Coinbase might ask for something specific to be entered here?)... put in the address that you accidentally sent the coins from... and then click sign... it will generate the signature.


2) Yes, once you have the signed message, you give the original message you typed into the message box, the ADDRESS (NOT the private key) and the "signature" to Coinbase (send them in an email or support ticket or whatever)... they should be able to then verify that you created the message using the private key for the address that sent the coins... which proves you have control/ownership of that address.


3) As in my previous message, you need to use the Ian Coleman BIP39 Mnemonic Code Converter tool (https://iancoleman.io/bip39/)... or just import your 12 word seed into Electrum as I've outlined above.

OK HCP thanks, that helps a lot,

I think I can follow it except where you say to import the private key into electrum.

1) Do you mean as part of a transaction, or  I just paste it into their signing tool?... or.. Do you mean in Electrum I go into Tools / Load Transaction / From the blockchain... and then paste the private key that matches the public key I sent from ?

2) Also, once Electrum has created a signed message - that is just some digits on a screen - how do I get that communicated to Coinbase linked to my account ?

3) While you are 'here'... within blockchain.info I need the private key linked to the public key I sent from - that is not at all immediately obvious to me how to get it - can you point me towards this?

... again, may be silly messages !


Also.. any ideas on coinbase support times - I'm hearing online it is up to a week and VERY poor ... at least with your help I can be prepared to make a clear case for re-allocation

No, you don't need to send BTC to prove ownership... you simply sign a message. This thread might prove useful: https://bitcointalksearch.org/topic/how-to-sign-a-message-990345


1) Basically, it works a bit like signing a transaction, you use the private key that matches the public key (address) to sign the message, proving that you have ownership of that private key.

So you need the PRIVATE KEY that matches the address that you SENT FROM... ie, your transaction from b.info to coinbase... you need the private key from the b.info address. You then import that private key into Electrum and then Electrum will let you sign the message from that address.


2) As above, using the address won't work, you need the PRIVATE KEY.


3) Unfortunately, b.info don't provide an easy way to export private keys if it was a key from your "default" wallet in b.info, but it IS possible to get. You would need to use https://iancoleman.io/bip39/

WARNING: You should do this OFFLINE (there are instructions at the bottom of Ian Coleman page that shows how to create an offline copy of the tool)

Put your 12 word b.info recovery phrase in where it says BIP39 Mnemonic, click the "BIP44" tab and then you should see your b.info addresses and private keys listed at the bottom. Find the address you sent FROM, it should be shown in the transaction details... then you can get the matching private key and import that private key to Electrum, and then you should be able to sign the message.

Thanks for all replies - I'm relieved there is a way this might work.  I've had a support ticket with Coinbase for nearly 36 hours now on this - no answer.  I also spent an hour trying to get through on their phone support number (to talk it over, I know I cannot do more than get reassurance from this)

Anyone have recent experience of when they might reply?

I also have a request from Blockchain.info from 48 hours ago with no reply

Specific responses to HCP and Thirdspace

HCP  
 - very helpful thankyou.  in preparation for needing to prove this you are suggesting I export some BTC to electrum from b.info then send a sum of BTC from Electrum to Coinbase ensuring I follow a process like https://www.cryptocompare.com/wallets/guides/how-to-sign-a-message-with-electrum/  

OK, so I can prove ownership of an address from this but can you explain - presumably I'm trying to prove ownership of the b.info address I sent the BTC from, by sending to my coinbase wallet from it.  

1) Are you saying electrum will know that I sent from the same one since I will have sent to electrum from it, so I can 'forward' proof ?
2) I have a B.info wallet ID which I'm not supposed to share with anyone - are you saying I will recognise THIS ID in electrum once I 've sent some BTC to it?
.... I'm trying to get clear which ID I sign to prove ownership and send to Coinbase given the ones I see are mostly public changing ones

sorry for what may be silly questions

>>> UPDATE .. I'm attempting to follow the cryptocompare guide above to sign a message.
1) I have the address there that I got money from b.info.  I guess this is the one I want to sign with ??
2) If I copy it and try to create a sign I get "Cannot sign message with this type of address... you should sign with the corresponding private key..... your address does not have a unique public key...
3) When instead of copying an address I right click .. Private Key... I get as a result .. "Invalid bitcoin address"
SO... how do I sign referring to the address I got from b.info ?


Thirdspace
Yes it is confirmed.  is there still a question of some way you suggest you might help?

In general - proving / pursuading coinbase seems the clear approach

Thankyou all and there will be a reward I'll div out if/when I get this back

sharing public address and/or txid only damage your privacy
since your tx was on Jan 1st, has it been confirmed yet? you haven't said anything about its status.
if it hasn't been confirmed there is a good chance you can double spend your bitcoin and less hassle contacting coinbase
it's your choice... are you willing to share the address and its txid?

That's just not how Coinbase operate... they will give you a unique deposit address... any coins sent to that address will be "credited" to your account balance... but the coins themselves generally get aggregated into "holding" bitcoin addresses...

When users request a withdrawal... coinbase batch them all up and then send the individual amounts from one (or more) holding address(es)... debiting each users account balance by the appropriate amount. The holding addresses are not "linked" to any particular user, they're just a giant pool of coins.

By sending the coins back to the holding address, you've made it impossible for Coinbase to identify who the coins should be credited to. If you're super lucky, they might agree to credit them back to your account if you can provide sufficient evidence that you were the one who deposited the coins... perhaps they'll accept a signed message from the address you just sent from?

From what I understand, b.info don't provide a way to directly sign messages from b.info wallet addresses any more... but you can probably export it to another wallet like Electrum or use the BIP39 Mnemonic Code Convertor (https://iancoleman.io/bip39/) and your b.info 12 word seed to get the private key for the address you used to send the coins.

Contact Coinbase and ask them nicely if they'll help out. That is pretty much your only option at this point.

I didn't mean your Coinbase account, I mean the Bitcoin address Coinbase used for your withdrawal. The same address you used to send your payment to again.

The coinbase account I sent FROM last July had 1.75 BTC and a roughly equivalent at the time $ value of ethereum

do you think that counts as a very high balance that would use their address or possibly a lower  balance that means they might have used someone elses address?

Was the address that sent you the coins 1 address with a very high balance? If so, it's likely to be one of Coinbase's own addresses, and in that case they should be able to give you back your coins (if they're willing to do so).

Another possibility is that Coinbase sends funds from other user's deposit addresses. If that's the case, your funds were credited to someone else's account, and in that case it's unlikely they can give it back to you.
It depends on the way Coinbase handles withdrawals.

In order for Coinbase to have sent you coins from that address, they would have to control the private key for that address. So yes.

Thankyou - I have written to them already but not heard back yet.. they say it may be a few days which is really painful

On Blockchain, it is possible to follow the transaction and it looks like it has 'gone' somewhere so if you are right it is missing but with coinbase which would be amazing

any ideas on helping me get clear sooner would be great...

so to be clear, you are saying the address that it appears to be received from is one created by coinbase and owned by them, just not directly linked to my account ?

I understand Coinbase uses its own addresses (rather than individual user addresses) so as to be able to aggregate transactions and thereby reduce transaction costs. But the address should be under their control, so my suggestion would be to contact them.

Hello

I'm really worried - Last July I transferred some of my BTC from my coinbase wallet to my Blockchain.info wallet.  On 1st Jan I attempted to transfer most of it back.

I saw on blockchain the 'address' from whcih the previous transaction came and sent them to that address.  They now seem to be lost

I have of course since mentally kicked myself very severely for not going to Coinbase to get the wallet ID and sending to that. 

I understand I sent it to a public / changing number used so it is not possible to trace multiple transactions?

Surely the chance of this being a valid wallet address is very low so what is happening and how do I recover them. 

I will reward well ($1,000 in BTC) assistance that sorts this but am obviously very keen not to share keys / addresses  etc on this forum