When i was trying to withdraw steem to bittrex, I rechecked the receiver name (bittrex). I think, whether people make mistake or not, in hurry. So i searched account names with bitrex and bitttrex and found this
https://steemit.com/@bitrex/transfers
So many people made wrong transaction, accidentally by spelling mistake. This gentleman, refund all the mistakes steem to the owner. So kind :)