In 2018, when he was running for Governor, the then Georgia Secretary of State purged the rolls of something like 165,000 (if I got that right) registrations for even minor details in the name (ie, not dotting the "i"s), most of those from certain areas with a large number of guess what demographics. Some of those were new applications, but older verified registrations were nixed as well, the voters not even being told of it.
This delightful bit of conflict of interest is said to have assured his election.
So the question of validation is a non-issue, as not that many zombie illegal aliens in darker toned neighborhoods could have registered since then, rigor mortis being a thing.