I'm in Upstate NY. We get these before any election/primary...local or federal.
Name, address, polling place, precinct, Registration number, Registration date.in GA.
In GA the registration date is the first date registered at any GA address many years prior...If the system tracks you from old address to new address... even if you did not register to vote at the new address but did register you to vote at a prior address.
And, of course, the above only applies to those it can track. I am known as both Robert and Bob. If I register as Robert one place and as Bob another place how does the system “know” I am the same person. If the system has my SSN under both names then it “knows”. But many times SSN is unknown, or only the last 4 digits and is not really “known”.