This sounds like such a secure way to count votes.
What would prevent me, a former North Dakota resident, from voting on line and using a former zip code? Does North Dakota have voter registration now (they didn't when I left) which they would check against?
If not, then anybody can do it . . . not just former North Dakota residents.
Did you file ND taxes last year? Maybe they are going by that or DMV records, I can’t say.