I have 4 RFID cards. Greenlots which I wrote BC- 2 on (with a sharpie). I also have VERnetwork (FLO), chargpoint and BC Hydro EV cards- which I wrote BC-1 on. No smart phone means I am dependent on these cards to log in for a charge, which sometimes the reader gives grief but otherwise work OK.
I guess if one doesn't work, I will use the tried and true method of trying each one, or if a kind person is close by with a cell, ask to phone for a charge start that way using the phone# on the machines - wouldn't be the first time