Gift certificates do not expire. Your emailed receipt is your proof of purchase and is all that is needed to redeem your certificate. If you'd like to send a gift certificate to another recipient, please include directions in comment section of checkout. (We can send them a PDF or a hard copy of the certificate.) In the case of a 10-pack, we will have a physical card waiting for you at the front desk the next time you come in. Thanks for supporting your local hydrotherapy spa!