All you need to do is revoke your Automated Clearing House (ACH) authorization ... s been debiting you and your account with the bank. The CFPB has sample letters for this as well.

Your bank account balance is negative ... You can at any time ask your bank to stop an overdraft authorization. In principle, you should send a letter to your bank. Contact your bank advisor ...

To sign up for Medicare Easy Pay, print and complete the Authorization Agreement ... for your monthly payment in your bank account, Medicare will send you a letter to tell you the deduction ...