The Fed will begin providing same-day ACH settlement for consumer checks converted to ACH and online- or phone-initiated consumer debit transfers starting Aug. 2nd. The duplicate payments between ACH and Check can and will likely appear before a bank can blink its eyes. A cross-channel Day 1 exception processing solution is an imperative in a same-day ACH environment. Maybe a bit of an increase in duplicates and other exceptions, but a definite issue on the timing. Originating banks will enjoy faster settlement of converted payments while the receiving banks will be under the gun to identify exceptions due to early cut-off times. For details on the Fed’s plans: http://www.federalreserve.gov/newsevents/press/other/other20100621a1.pdf