Three forms of Key exist: child, adult, and staff. All child smartcards need a photograph, which is printed onto the card, as well as proof of age while registering. The Key can be de-activated and the tickets transferred to a new card sent out in the post if the smartcard is reported as lost, stolen or faulty. Staff smartcards are only issued to employees of GTR, and offer unlimited travel across all of GTR's network.
thReE forMs of keY exiSt CHILd aduLt anD staff ALl cHild smartcArdS NEeD a phoTograph whICH Is pRinTed oNtO THE CaRd As wEll aS PROoF Of age whILE ReGIstEring the key caN be de-acTivatEd and THe tICketS transfeRReD tO a new card sent OuT In the poSt iF the SmArtCaRd iS repOrted as loST StoLen Or fAulty StAFf smArtcards arE oNly issued to emPloYees of gtR And OfFeR UnlimiTeD trAVel ACRosS alL OF gtr's nEtwOrk