Ahead of the Wisconsin Supreme Court election in April, Green Bay election officials accidentally sent duplicate ballots to 150 voters, prompting an administrative complaint before the Wisconsin Elections Commission and conspiracy theories online.
In a slightly different example from this year, some voters in Maryland initially received primary ballots for the wrong party. Election officials then intentionally issued new ballots for the correct party to all voters who had requested a mail ballot, and the original ballots were voided. Nonetheless, President Donald Trump falsely suggested that nobody knew what was happening with the original ballots and that “any Republican running in Maryland doesn’t have a chance” because voters who received them, which were disproportionately Democrats, would be allowed to vote twice.
Despite the heightened attention, election officials accidentally sending duplicate ballots — or sending out an erroneous batch before intentionally sending corrected ballots to the same voters — is a rare but well-understood mistake nationwide that hardly ever results in the type of double voting Trump has warned of.
“Once any ballot is received and accepted, it locks down that voter’s record, so that a second ballot could not be accepted for that same voter,” said Tammy Patrick, chief programs officer of the National Association of Election Officials. “That’s the way it works everywhere.”
Two primary mechanisms keep these accidental duplicate ballots from getting counted: proper record-keeping and deterrence, said David Levine, an election security expert and the election director in Richmond, Virginia. Generally, that record-keeping is done by putting unique barcodes on absentee ballot envelopes, which prevent people from voting more than once.
“It’s usually not an issue because, one, election officials are pretty good about contingency planning and having procedures in place, so if something like this happens, they know how to either void ballots or segregate them appropriately, so that they’re not going to be counted,” Levine said.
Second, he added, most voters understand that double-voting is a crime, and it’s not a practice they want to engage in. A study of 2012 election results found that, at most, one in 4,000 votes cast could be a double vote, but that clerical errors in marking turnout records — not actual double voting — may account for most if not all of that number.
Some of the attention on these mistakes comes from people who are genuinely unaware of the protections that keep double votes from being counted, Levine said. But, he said, there’s also scrutiny from people who are familiar or should be familiar with those safeguards but “choose to try and make a lot of hay out of something that’s largely much ado about nothing.”
Why do duplicate ballots get sent out?
Simply put, election season is an extraordinarily busy time for clerks and the vendors that print their ballots. Sometimes amid their multitasking, they mistakenly send two batches of absentee ballots to the same group of voters, or send an incorrect batch and have to send a second, correct one.
In the Green Bay instance, Jeffreys said election officials were scrambling because a mid-March blizzard closed much of the city, and her staff faced a time-crunch to send ballots out on time. The city sent notices to the 152 affected voters before Election Day. Ultimately, just one voter returned two ballots, and both were voided after Green Bay officials alerted the voter about it.
In Maryland, the State Board of Elections said the initial batch of ballots was erroneous because of a coding error with the board’s mail ballot vendor. Since the vendor couldn’t identify which voters received the wrong ballots, the board decided to send new ballots to everyone who had requested a mail ballot in that election and void the old ones in the state’s registration database, so they wouldn’t count even if voters returned them.
Similar errors have happened around the state and country. Ahead of the 2024 presidential election, Madison, Wisconsin, officials sent around 2,200 duplicate ballots because of a data processing error. In Racine, Wisconsin, this year, election officials intentionally sent voters a second batch of ballots because the first set left off a municipal race. Other incidents have happened in Pennsylvania and California.
What keeps those erroneous ballots from getting counted?
One of the best tools election officials in Wisconsin and elsewhere have at their disposal are unique barcodes printed on the absentee ballot certificates that voters receive.
Those barcodes in Wisconsin connect to the statewide voter registration database and are unique to each voter. Other states have similar systems, with unique identifiers tying an absentee ballot to each voter. If an election official scans a duplicate ballot, the system shows that the voter already returned one, and one of the ballots is rejected.
That’s a “very, very established process,” Wisconsin Elections Commission administrator Meagan Wolfe said after the Green Bay incident.
In examples like Racine, when voters receive a ballot missing a race or containing another error that can be corrected before Election Day, officials will intentionally send another, correct ballot to the voter. The first ballot becomes known as the “A” ballot and the second one is known as the “B” ballot.
If a voter returns just one ballot, that vote will count — including only valid votes from the erroneous ballot, if that’s the one submitted. If a voter returns both ballots, officials will scrap the “A” ballot and count the “B” since the latter is the correct form.
That’s different from Maryland, where election officials voided all of the original ballots and reissued new ones.
How specific instances of duplicate ballots get resolved — whether that’s canceling out all the original ballots or planning for “A” and “B” ballots like in Racine — can depend on state laws, officials’ discretion and court rulings, Patrick said. How close the error is to election day and the jurisdiction’s budget can also influence how election officials handle duplicate ballots, she added.
Patrick also drew a distinction between officials sending out duplicate absentee ballots and the rare but occasional instances of double voting.
“More often than not, the rare instances where we see it, it’s an individual voting in two different jurisdictions or two different states,” she said. “It’s not so much that a single person is voting in the same election, in the same jurisdiction, under the same name.”
Alexander Shur is a reporter for Votebeat based in Wisconsin. Contact Alexander at ashur@votebeat.org.
