Laws that require mail in ballot to have either a drivers license number or a Social Security number upon both registering and voting do provide a chain of custody. They did that in both Texas and Georgia. It prevents both illegals from voting and out of district people from voting. Signature matching is a joke when offered up as a chain of custody guarantee.
DL or SS # requirements appear to be the best we can hope for and should be the real focus of any challenge to mail in voting..
I believe that effective in October, a federal Id Is required to fly. That is being implements in Tennessee as a new and special drivers license.
I had to go to the county court’s office to get the special DL that replaced the valid and existing DL
That means, requiring a driver’s license is in effect requiring a federal ID