tagged on

Verb

tag on (third-person singular simple present tags on, present participle tagging on, simple past and past participle tagged on)

1. (chiefly public transport) To hover an RFID device such as a smartcard over a receiver, often with a graphical user interface, in order to make a payment or gain entry.
   • Contactless smart card readers can be mounted at each door of an LRT car, allowing a rider to “tag on” and “tag off” on boarding and alighting the vehicle.2003, Daniel Fleishman, United States. Federal Transit Administration, National Research Council (U.S.). Transportation Research Board, Fare policies, structures and technologies: update, page 39

   Synonyms:

   swipe, flash, tag, touch in