Each member has their own unique smartcard. Never share your smartcard, even to other people on your own account.
Your smartcard uses contactless RFID technology. You can keep your smartcard in your wallet or a card holder, and the card reader will usually read it fine - depending on the thickness of the material, the presence of other RFID cards, and other factors.
If you've lost your smartcard visit one of our pickup locations to collect a new one, alternatively, email firstname.lastname@example.org with your address and we will post you a new one.