> 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.