did their voting, decided to have a "paper trail", and do this. It was reviewed and legality confirmed by the Democratic state Attorney General and also approved by the Democratic Lt. Governor (like the VP of the state). Leave it to Democrats in our state to make it easier to vote and expand voting hours and places, while other states (namely red ones) try to limit them and make it harder to vote.
I have been voting by mail for about 6 elections now (Presidential, Primary, and local county ones), and it is very easy.
They even give you a prepaid envelope to return your ballot, so you don't have to pay for anything. It is usually yellow (or occasionally a large white one).
One can also check online at their local county registrar's office website to determine if their ballot was received and will be counted. You only need to put in your last name, and either the last 4 of your SSN, or CA DL (Driver's License) number if you don't want to divulge any SSN info, or don't have one.
If it was received and your identity confirmed it will show something like:
First Name: John
Last Name: Doe
Party Registration/Affiliation: DEMOCRAT
Date Ballot Mailed: September 16, 202x
Date Ballot Received: October 15, 202x
Status: Ballot Accepted
The "Ballot Accepted" sometimes just shows "Accepted" and means that it was received in the timeframe allotted and the signature matched (usually the one on file, or maybe the one that the state DMV has) and everything was accepted and is "good to go".
It still won't be counted until AFTER election day though.