Answer:
A counterfeit check is treated the same as a check on which your depositor's signature is forged: the midnight deadline applies. The Fed's requirements for returning remotely created checks are specific and refer to the definition of such checks in Regulation CC, which your counterfeit doesn't meet. I'm afraid that, unless you are able somehow to determine who counterfeited those checks, your bank is out the money.
First published on BankersOnline.com 10/04/10