<prompt> Human: Ill try to keep this as short as possible: November, got a Credit One credit card. December, attempted to pay credit card bill. Website would not accept my bank account information said my account numer was wrong, even though I was copying and pasting it...?. Called Credit One and paid my bill with my debit card over the phone. January, opened a Capital One credit card. Transferred balance from Credit One to Capital One, and paid Capital One off in full no reason for the balance transfer, it was free and Id never done it, just wanted to know how it all worked. Sunday, attempted to pay the February Credit One bill. We were running late for dinner, for context. I clicked to pay directly from my bank the one whos number they said was wrong and it went through, no problem. I didnt even remember the previous issue. Halfway through dinner on Sunday I remembered the issue. Got home Sunday night and went to log into my Credit One account to make sure my payment was processing, and it says my account has been suspended. Talked to customer service, theyre telling me they cannot verify that I have a bank accountthat the bank account Im entering is mine. I asked if I could just pay with my debit card, and they said the only way to unsuspend my account is to have my bank send them a verification letter with my account number, routing number, and bank contact information. Is that even a real thing? It makes me really uneasy sending that information via mail. Im 99.9 confident Im not being scammed or anything; the card is real, the number I called was straight from the Credit One website. It just seems odd to me. I bank at Bank of America, so its not like I was trying to pay from some tiny local podunk bank. Im also considering just closing the account. They arent the easiest to work with, and I only opened the account because I thought Id never get approved for a credit card, so when I was I jumped at the opportunity for another tool to rebuild my credit with. If I call and get my total remaining balance, can I just send them a check and a letter asking for my account to be closed?  <response>: Determine how you can pay off the account and close it. The hassle simply isnt worth it. 