A relative of mine was born in Israel and lives in the states, they want to travel to Israel but are scared of being stopped and forced to mmake Israeli citizenship, so before they travel they want to renounce citizenship, but here is the catch they aren't sure if they are in the system as most of the family has renounced theirs years ago, but something went wrong by theirs, if not then they certainly don't want to give it to the Israelis on a silver platter to stop them.
So is there a way to check if they are in the system ?