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It would be very kind of you to check if the wallet 16h1u6piTtTxcuRsavXCNw2Aw5wLZFEwqu was ever served by Blockchain? The subject fraud transaction is https://blockchain.info/tx/fcaf44a74c3471b9d8f4fb7fc080637ccf096ed1bfdb1df6d9290d1c472cb98b when 1.205BTC was withdrawn to here from localbitcoins.com and forwarded further.
First replied blockchain, saying that they do not see anything in users wallets including addresses. Despite my not well English I am sure that I was understood but they pretended that they did not:Quote
I'm sorry to hear of this trouble, but the bitcoin network is designed to make chargebacks impossible. Blockchain.info never has access or control of your bitcoins in any way, which means you have 100% complete control over your own bitcoins. This means we have no power to reverse a transaction for you.
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Thanks for quick reply. I am not asking about chargeback. I am asking to check if this wallet was served by Blockchain servers or not. Or it may be there was transactions to or from specified wallet to these which are served by Blockchain. Honest no or simple yes could help a much for investigation.
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We would have no way of knowing, as we don't know the addresses listed in a Blockchain.info wallet. We never have access to a user's funds or keys.
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I suppose blockchain.info serves the transactions of their customers and this transaction information with related wallet addresses is public. I did not ask to reveal any private information. What I would like to certain is the 1.205BTC withdrawed to fraudsters wallet touched blockchain.info service or not. The fact of fraud is officialy registered in UK police and anti-fraud agency, but due of a small amount and lack of resources of these organisations, I am trying to determine who served the fraudsters wallet as I am almost sure that they did not used generic bitcoind for this. If the answer from blockchain.info is yes then official order will be issued from police to reveal the IP, email address and other private information regarding fraudulent transaction. I would appreciate a negative reply too. But please make a try 
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Anyone can import any private key into a wallet, and we have no way of knowing. They could have this private key in 100 different wallets, too. Even if we wanted to reveal the contents of a wallet we would have ZERO ability to. We don't have passwords. Without the password you can't decrypt the wallet and see what's inside of it. So it doesn't matter if every single government organization in the world wants the contents of a wallet. If the password is strong enough then there isn't enough computing power on the planet to crack it.
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I am asking to forgive my English and please let me rephrase my intention. Wallet address as well as amount of processed BTCs is public information. What I need to know is was the transaction specified below and two outgoing TXs after that from the specified wallet passed trough blockchain.info web wallet service or not. Should I believe that blockchain.info does not keep any transaction history and is fully anonymous? How then could blockchain.info maintain a decent level of security for their customers if there is no transactions and access logs available? It is nonsence. I am sure that this check does not require much resources and should be a routine for support team.
And again, the reason why I am (not gov officials are) asking for this check up is the lack of resources of antifraud and cyberdep gov bodies. If you refuse this enquiry I can understand that but it would be just a sign that blockchain.info is not open enough to the community and gives opportunities for all sort of criminals to ruin bitcoin reputation. If there is need in confirmation that crime was actually committed you could ask London Met Police Officer xxxxxx xxxx <[email protected]> or enquiry antifraud agency using reference no. NFRCxxxxxxxxxxxx.
The same double ask I received from btc-e and no reply from bitstamp. The reason why I contacted to these bitcoin services not the gov officials is the small amount of fraud BTC1.2 and the lack of the resources of police and anti-fraud agency. I propose to discuss this bitcoin businesses behaviour and generally, should they track service usage and provide this information to those who are asking it or stay be a blackbox burying bitcoin reputation as a criminals tool? And again, the reason why I am (not gov officials are) asking for this check up is the lack of resources of antifraud and cyberdep gov bodies. If you refuse this enquiry I can understand that but it would be just a sign that blockchain.info is not open enough to the community and gives opportunities for all sort of criminals to ruin bitcoin reputation. If there is need in confirmation that crime was actually committed you could ask London Met Police Officer xxxxxx xxxx <[email protected]> or enquiry antifraud agency using reference no. NFRCxxxxxxxxxxxx.