Old Alien Flick

Hey folks,

I believe it was a movie from the 80s or 90s.

The scene I remember was some sort of alien (human looking) in a convenience store. It's at the counter buying things. The teller says the total. The alien whispers into its jacket & pulls out a 100 or 1000 dollar bill. The teller asks if it has something smaller. It whispers into the jacket again, and pulls out a literal smaller bill of the same denomination.

It's been driving me nuts. Thanks for your help.