Cashier’s check presented as ACH entry

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Question:

What can we do if one of our cashier’s checks is converted and paid as an ACH check conversion?

Answer:

You can return the ACH entry using an R10 code (completing a WSUP for the files). You have about 60 calendar days to do so. Or, if you caught it in time to return it with an R39 (regular return deadline), you won’t need the WSUD. Both the R39 and the R10 can be used for “improper or ineligible” check conversions to ARC, BOC or POP entries, and checks that are obligations of a financial institution are not “eligible source documents” (see Nacha 2020 Operating Rules, section 8.36).