Wiktionary
alt. (context predominantly public transport English) To hover an RFID device such as a smartcard over a receiver in order to complete an action with a often involving graphic user interface such as making a payment or permitting access. vb. (context predominantly public transport English) To hover an RFID device such as a smartcard over a receiver in order to complete an action with a often involving graphic user interface such as making a payment or permitting access.
WordNet
Usage examples of "tag on".
In the meantime, while on Query I was wearing the removed tag on a chain with the appropriate gadgetry to ensure that the Tribunes did not know I had removed it.
You had to have had your tag on for that to be possible, and believe me, Ms.
Ferris knew it might happen and he got at the local police through Interpol and they put a tag on Zade and that was how we knew he'd booked out on Panair do Brasil Flight 540 in two days' time.
We spook him, he could ditch Roles and go with something we don't have a tag on.
In the meantime, I was wearing the removed tag on a chain with a miniature power cell while I was on Query to insure that the Tribunes did not know I had removed it.
The land title was in the name of a paper corporation, in turn owned by a foundation whose directors were obscure, but since real-property ownership in America is a matter of public record, and since all corporations and foundations were also, that data would be run down in less than two days, despite the tag on the files which told the clerks in the county courthouse to be creatively incompetent in finding the documents.