OK, I'll give it a shot. Having managed research and adjustments for a large, large bank, it is very possible that the insurance company did receive the check, deposited it and then subsequently the check was lost in processing. If this was a check for under $300.00, a lot of banks do not even bother trying to pull a photo and enter for collection. They have a minimum dollar limit that they just 'write off' as a cost of doing business. Its cheaper to do that than to hire labor to collect these items. If the insurance company is ok, then I would continue to show it as an outstanding item and let it escheat at the appropriate time.