Offer your thoughts or opinion on the input financial query or topic using your financial background.

Is it possible to block previously authorized ACH access?
I had a similar situation a while ago, and here's what I learned: What are our options here to ensure that this company can't retry to take our money again via ACH? Close existing account and create a new one that has different account number? Yes. As a temporary solution keep ~$0 balance in the account so that their request for $840 can't be fulfilled? However, would our bank incur any fees because of insufficient funds each time the other company tries to charge us again? Bad idea. You may incur penalties for returned payment, or the bank may honor the payment and charge you overdraft fees. Provide to our bank the service termination notice that proves that we   are not in business with the other company anymore and effectively   block them. However, termination notice has only our signature Bank doesn't care. ACH withdrawal is akin to a check. The assumption is that the other side has entitlement. You can put stop payment once its processed and try to reverse it claiming fraud, but the end result will be #1: you'll end up getting a new account set up, while they try to recover the money. This is one of the reasons I'm reluctant allowing standing ACH authorizations any more. Generally, the American banking system is very much geared against the consumers, and in many ways is very retarded. In a more advanced countries (which is almost any other country than the US), the standing withdrawal authorization goes through your bank and can be revoked.