Hole punch on an identification or driver's license?

Question

theres a reason the DMV or anyone else puts a hole punch in and identification or drivers licesce but i cant remember what the reason is

Answer 1

It shows the card as not valid.

Answer 2

A am a police officer and when I see the hole punch, it lets me know that it is not valid or possibly expired.  The officer sees the hole punch and asks for other I.D.  The hole punched license is now just a picture I.D.

Answer 3

its when your license is revoked or expired. they punch it so people know its no longer valid.