It’s obvious how this will end:
his ID-card will be cancelled, or withdrawn, or whatever.
The reason for this will be that he just admitted to forgery, nevermind the fact that he did present the authorities with an accurate likeness of his own face.
And then he will smile smugly and reply that it was just a prank, bro, because he really lied about all the computer stuff and it was actually just a regular photo of him the whole time…
And everyones minds will be (predictably) blown.