Lots of people on the AA board have posted that their certificates were returned when they sent in expired ones. It seems a waste, especially when the line on the certificate states "good until xxxx xx, 2001 or until supplies are exhausted". If one can still buy products with expired certificates, it seems to me the supply isn't exhausted. I've tried several times to explain this to them, but they won't hear of it. You could try sending them in (don't mix new ones with these...you'll lose them) and see what happens. Good luck.