[BipolarBob]

When police are handing out a summons to someone who has no ID, they bring the person to the police station.

With no ID how do they know it's the same person they have a summons for?

[thackney]

Not a warrant, but writing a ticket for breaking a law. It is a summons to appear in court at a later date, if you don’t want to pay the fine.

[Boogieman]

In this case, they can just check his IMDB photo.