> If they put an ID on a sanction list, there’s a possibility to verify it

They didn't care to figure out if the Sean Byrne of County Sligo actually existed before putting the name on the list. I doubt they would bother verifying an ID number.

Plus, going back to my point about the list being full of foreigners, how do you verify the validity of a foreign ID number and address? Maybe Ireland is going to comply with a US request, but many other countries won't, and you are now back to square one.

Don’t let perfect be the enemy of good. As you said, Ireland might comply, which would’ve solved this particular issue.