By comparison, this is what my county does (Santa Clara, CA) - from a recent interview in the local on-line paper with the county registrar:
"The voter's authenticity is determined by the signature on the back of the envelope. That envelope, when received at the Registrar of Voters, is scanned by a machine to capture the signature digitally. That signature is compared with one or more of your signatures that the elections office has on file, drawn from your voter registration card and from documents you've submitted to the Department of Motor Vehicles.
The sorting machine kicks out each ballot with a signature that doesn't match. Next, staff review the ballot signature side by side with the signatures on file. They look for common handwriting traits, such as the slant of the writing and the letters' ascenders and descenders. If the authenticity is still in doubt, the ballot is sent for review by management staff. Voters whose ballots cannot be confirmed as authentic will receive a mailed notification letter and will have until Dec. 1 to provide a signature that matches the file signature.
In the November 2018 election, 820 letters were sent to Santa Clara County voters because of mismatched signatures; 617 voters responded satisfactorily, ensuring that 75.2% of those questionable ballots were counted, according to a county election office report. (About 487,000 vote-by-mail ballots were cast during that election.)"
Hmmmm, transparent election procedures and encouraging more people to vote - I wonder if this has anything to do with the continued decline of the GOP here?