[muawiyah]

Back in 1966, just to see if it could be done, I entered Canada from the US simply by displaying my draft card which said I was "1-A". I also re-entered the United States from Canada the same way.

I did not show an identity card in either direction.

[moehoward]

Last time I went to Mexico (Cabo) -it's been a while- all that was required was a voter registration card. A card I got without showing any ID at all.