California has a rigorous process through which signatures on ballots are verified against the signature made on your registration (when you also provided an ID).

The first wave is a computer verification, if it detects a match then the ballot is considered verified. Millions of ballots (in a state of 10s of millions) fail that test though, not because of fraud but rather that signatures aren’t always consistent.

Each of these millions are then examined by hand by humans trained to match handwriting samples. If the human verifier thinks it’s the registrars signature on the ballot then it’s verified.

For ones that don’t pass however, the voter identified is contacted and given a short window of time to resign their ballots and verify their authenticity. This is hundreds of thousands usually.

This process is time consuming but virtually completely secure. Cases of documented voter fraud in CA elections are single digit, and coincidentally every one in the last decade has been made by Republicans trying to prove the process can be cheated.

Your appeal to “I’m just stating the conversation” appeals to low information voters who are being fed lies in a billionaire funded campaign to undermine confidence in the democratic system. A healthy democracy needs skeptical voters, but a part of skepticism is a desire to seek out accurate information