And if someone is wondering what California does-—
“”” https://elections.cdn.sos.ca.gov › pdfs › trusted-info › vbm-faq.pdf
[PDF]Vote-by-Mail Ballot Return Frequently Asked Questions
All active registered voters in California will receive a vote-by-mail ballot and a First-Class, postage-paid ballot return envelope”””
And Utah who is holding primary election today is doing the same thing with mail-in ballots as California.
“””Vote by Mail
Elections in Salt Lake County are conducted mainly by mail. Ballots are mailed to active, registered voters 21 days prior to an election, according to Utah State law.
The post office does not forward ballots. If you need your ballot mailed to an address other than the address where you are registered to vote, contact the Salt Lake County Election Office.
To receive a mail-in ballot you must be registered to vote no later than eleven days before an election.
Mail in ballots may be returned in one of these three ways:
Option 1: Return by Mail
Return it by mail in the postage-paid return envelope provided in your ballot packet.
To be valid, your ballot must be in the clerk’s possession by 8:00 p.m. on Election Day. This deadline has recently changed, so make sure to mail your ballot early.””””
https://www.saltlakecounty.gov/clerk/elections/vote-by-mail/