Here is an interesting report on signature verification in the Nevada election this year. Notes it’s a re- report of an article that originated with the Las Vegas Review Journal which is behind a paywall.
Journalist tests Nevada voter signature verification
https://www.westernjournal.com/journalist-tests-nevada-voter-signature-verification-discovers-whopping-89-failure-rate/
The evidence of a "whopping 89-percent failure rate in catching mismatched signatures".
Joecks had nine co-conspirators. He wrote their names for them to then copy,
trying to imitate his handwriting.
The citizens had to sign the ballots to ensure there was no fraud perpetrated while conducting the test. Clark County Registrar Joe Gloria told Joecks that if ballots signed by someone else “came through, we would still have the signature match to rely on for identity,” he said.
Queried about his confidence in his office’s ability to pluck a fake ballot out of a sea of the documents, he told Joecks, “I’m confident that the process has been working throughout this process.”
“He was wrong,” Joecks wrote. “Eight of the nine ballots went through. In other words, signature verification had an 89 percent failure rate in catching mismatched signatures.”
* A journalist has nine people sign their name while trying to imitate his handwriting. He finds that 8 ballots signed by the actual citizens,
who are signing their own name, (while
trying to imitate someone else's handwriting) are accepted and one is that is not. Wow, how could any court turn down solid scientific evidence like that!