examplens. wants to say that the exchange from which you send coins to the eXch deposit address may request KYC or something like that (or freeze your funds using any pretext). In addition, usually centralized exchanges have different input and output addresses (hence several more inconveniences).
In this particular case, the best practice is to send coins from your non-custodial wallet to the eXch deposit address (there is no chance that you will encounter similar problems like those you encountered today).
Btw, I know of many cases where users have passed identity verification twice (when sending coins from a centralized exchange to exchangers from the BestChange list).
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You don't control the keys to the address. I've seen countless topics from people who can't use RBF or CPFP because they're neither sender nor receiver of the transaction. Or, when it comes to it, you can't prove you're the sender.
As nice as it is to save on transaction fees, using your own wallet "in between" is usually better.
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CEX are not wallets for storing coins, but trading platforms. That's how they should be treated.
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Even if CEX (or any similar service) wants to return coins, it would always go to the address they came from. How complicated would be the process of proving ownership of the coin that ended up in the wallet of the exchanger?
Thanks your answers...is very important... on begin, i used do this, with the time, i let of do... and i send direct toswaps xchanges... and almost never i used return address..... now, i will back do correctly again...is an bit more work, but is better pactice it than comming have problems that i can t solve,,, many thanks,,, i understand very well...