There are many places online that offer plastic magnetic cards of high quality (
Reward-It as an example). Your main choices are quantity, double-sided or single-sided printing, and finally, whether to have a magnetic strip on the back or use a barcode instead. We would always recommend using a magnetic strip to swipe a customer’s card or gift voucher. The customer number should be sequential, encoded on track 2 where possible. For gift cards, encode the voucher code on track 1, as that supports text. HiCo encoding is greatly recommended to ensure the data is not wiped easily. We also offer a
digital wallet card service where you can add hassle-free loyalty cards straight to your customers' Apple Wallet or Google Wallet.