An identification card is a small document that shows who you are. It contains your name, picture, and personal information to prove your identity to other people or organizations. Full definition
This, despite the fact that many of our friends didn't drive, but they did have state issued identification cards so they could get into the bars! (law.stackexchange.com)
With its passage, the city is now creating what will be the country's largest municipal identification card system. (newyork.cbslocal.com)