[lawnchair_larry]

I'm wondering about this question myself. It's not as if the facts of your identity change because a country revokes a document. Is it just a policy issue, that there are no countries that allow entry without showing a passport?

It certifies his identity, not his rights. I'm not sure how you can suddenly claim it's not valid, without claiming that the original certification was found to be incorrect.

[dreamfactory]

It sounds like the old Russian system where you couldn't leave the country without a passport (and it was made very hard to get one).