As of 2015, Subway cards can be registered online on the Subway website. The cardholder must have the card and all of its information to hand.
Registering a Subway card requires personal information. To register a card, it is necessary to have a Subway website user name and password. The creation of these requires a first and last name, a phone number, an email address, and a zip code. Once this account is created, the user can enter the My Subway card number and the card's pin number. Registering the card online gives the card holder the ability to protect the balance from theft, as well as check the balance online.