We provide a wallet card.  It's located on the bottom portion of the certificate.

For a more durable wallet card, print using a heavier stock paper.
We print and send certificates on 60 lb paper. 

To increase durability some people have their wallet card laminated.

Lamination is offered by local retailers such as:
Staples, FedEx, UPS Stores, Office Depot, OfficeMax, etc.

You can also do inexpensive lamination at home.
Watch the video from the link below.