POP transactions are not UCC-covered. They are EFTs subject to NACHA rules. There's nothing in the definition of the "Eligible Source Document" for a POP entry that says anything about stale-dating. Even under the old UCC a check under 6 months old wasn't stale when presented, and in today's UCC, a date more than six months old doesn't mean the check can't be paid.
If your customer decided after a couple of months without the transactions clearing that they wouldn't be presented, he's just had a rude awakening after having the use of that extra money in his account for 5 or 6 months.
John S. Burnett
Fighting for Compliance since 1976
Bankers' Threads User #8