Maricopa Signature Verification Software Says 10% Is High-Confidence Match

  • A close examination of the signature verification software used by Maricopa County in Arizona reveals a strikingly low threshold for signatures to qualify as “high-confidence” matches. Signature verification is central to Kari Lake’s legal complaint, which the Arizona Supreme Court this week remanded to the trial court.
  • Signatures “are assigned a score” from 0 to 100, reads the contract, “based on the verification; signatures with a score of 10 or higher are routed to a high-confidence manual signature verification queue, and signatures with a lower score are routed to a low-confidence signature verification queue.”
  • Signature verification applies to early ballots, when voters’ signatures on the ballot envelopes are checked against signatures in voters’ files to ensure they match. There were more than 1.3 million early ballots cast in Maricopa County’s 2022 general election.
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