You are incorrect (unless things have changed in the last few years). I had gone through this with a bank (which shall remain unnamed) and apparently , such transfer does not work like a credit card charge where you can dispute it. When I asked for the bank to produce an authorization I signed for the charge, they told me they are not required to provide me one, that their obligation ends with providing me who transferred the money. It was a recurring charge, so I asked if I can block future transactions, they told be "sure", but they need to be accurate down to a penny, no way to block a specific recipient. When I asked to just close the account and start a new one, they told me new transfers will likely automatically forward to the new account. So I asked how does one start such a transfer, they told me all the initiator needs is account numbers and perhaps the name. So I told them I would bring them 1,000 account numbers and names before the end of the week, then ask them to transfer $199 from each account to mine, and if anyone complains, just transfer it back - I will just keep the money the people won't notice. This is where they walked be out of the branch and closed all my accounts, which was fine by me as I was ready to quit the bank and it was actually faster than me having to fill out paperwork to close all the accounts. I shopped around for new banks, and one told me they were in fact able to block any incoming transfer from a particular company, but it would be a manual process so it might delay my other transaction, but I was happy they offered it so signed on with them to do banking - never used that option but it was nice to know it was there. Btw, the original bank approached me with an offer to do business with them a couple of years later, and once I agreed someone called me back to tell me apparently I was banned for life to do business with that bank. I said "ok, no problem, I like your offer but I can live without it", to which the banker told me he will dig deeper into this, and couple of days later apparently the ban was lifted and the bank gave me a live of credit for my business. Such is life....