Doug,
Look in the other direction. When your bank endorses a check that PERA issues, there may be a legend on the check warning you that the payee has to be alive on the issue date of the check. But when you accept PERA direct deposits, you don't sign anything as the bank that binds you to a reclamation process. The Treasury Department can force you into accepting reclamations under regulations, but I'm betting that PERA can't.
I'd suggest responding with a request for a citation from PERA to the law or state regulation that requires you to return the funds.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8