CA mandatory mailed ballots do not include privacy envelopes. Even CA Anon's HOA shields a homeowner's vote by having it placed in an internal sealed envelope, distinct from the external envelope which contains the voter's verification signature and personal info.

California, however, does not protect voter's privacy (or guard against potential envelope opener "misplaced ballot" bias) or blacklisting of voters possibility. The verification envelope with the voter's identifying and signature in CA elections opens up directly to the voter's ballot choices.

If it costs too much to add a privacy envelope, then GO BACK to IN PERSON voting where verification that you are a registered voter (though not necessarily a citizen!) occurs at check in table, then you take a ballot to a shielded screened area and mark your private vote, then you (in CA) run your ballot through the (perhaps corrupted) counting machine.

No one sees your vote choices and your name together with IN PERSON voting. That is not true with mail in voting.

More opportunity for fraud.

The last thing we need.