Paper ballotsMexico has voter ID cards required to vote, and when you vote, they punch a hole in your card to prevent multiple votes in the same election.
Purple fingers
Mandatory free on demand BIOMETRIC (iris scan, nobody ever left their irises at a crime scene!) photo voter ID card, with a database that instantly flags for arrest anyone seeking multiple IDs. Change of name or address? Simply have your old card voided when you apply for the new one.
No precinct reports their totals until ALL precincts report they have totals. This prevents the last to report precinct captains from knowing how much to fudge a report to give a win to their preferred candidate while maintaining some slight semblance of credibility.
Repeal Motor Voter.
End same-day registration where it exists, and allow ample time between registration and election for vetting of credentials of registrants.
Instantly deport any non-citizen who registers to vote.
Put a little ⩍ next to the names of those registered voters with death certificates, and detain and put a 72 hour psychiatric hold anyone claiming to be a dead person...
End early voting. Every voter deserves and has a responsibility to know the latest information before they cast their ballots.
All voter rolls are automatically and completely purged ten days after the Presidential Inauguration. Reregistering to vote every four years is not an imposition. H/T The Chid
I don't know if you get a 10% discount after you've accumulated enough punched holes...