Desperate for a drink

Nikki and I are waiting to get drinks at the bar at the bowling alley. The server is checking ID for some people ahead of us.

Server: Can I see some ID?

Young girl: *hands a piece of paper that looks like an official government document*

Server: *pause* I'm sorry, I can't accept this.

Young girl: Why not??

Server: Well...the picture is taped on.