tlc: both the Phelan and WW branches of the SB Co. Library have drop boxes for the ballots. The cast ballots are picked up weekly from the libraries by the SB Registrar of Voters. There are also probably other drop box sites, but these are the ones I'm most familiar with and would be the most comfortable using. No need to spend the money if you are driving by, or using, one of these sites. You can also vote in person, but if you do so, you must have your mail-in ballot w/you to ensure you are not double voting.