If they put an ID on a sanction list, there’s a possibility to verify it. They could verify that it actually belongs to the person they want to sanction before putting it on the list. Failing that, the actual person can prove that they don’t belong on the list by verifying their identity.

Verifying identity is a much simpler problem than establishing identity.

> 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.