Has anyone completed a stay using free night certs that expired before the stay?

I managed to reserve award nights in Oct using certs that expire in Sep. The certs were pulled from my account and no longer show under "Unused Rewards Certificates."

The booking confirmation shows "The reservation has e-certificates. Your e-certificates will be sent to the hotel." I don't want to check in and find out the e-certs expired before getting redeemed by the hotel.