Answer:
Reg E provides you with specific time frames by which you must complete your investigation. If you finalize your investigation early, or if you go to the last day, when you say it is final, it is final.
The merchant may have more time than you do to finalize a transaction. That's just the way it is. They may be following more liberal Visa, MasterCard or ACH rules. That is addressed in your agreement with them under the Visa, MasterCard or ACH rules. It isn't an agreement you have with your consumer. As bankers, we have to follow the EFTA law and Reg E as that is our agreement with our consumers.
First published on BankersOnline.com 2/25/13.