You aren't in a good position to grill the two non-customers for answers, but I do recommend posing the question to your customer. You can be direct: "We saw three checks on your account cashed by these two payees on the same day, and they appear to be married. Is there any reason you issued your checks that way instead of a single check payable to both of them?"
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8