Vote at home
Ballots are sent to all voters, automatically, with the jurisdiction providing multiple return options, such as mail, staffed vote centers, and/or secure drop boxes. Thus, the distinction of this system is that nearly all voters receive the ballot before the election but may or may not return them by mail. Three Vote at Home (VAH) states (Colorado, Oregon, Washington) have been automatically mailing ballots to 100% of their active registered voters for some time, while Utah joined the list in 2019 and Hawaii joined in 2020. California is well on its way to the same goal in 2022 or 2024. In most of these jurisdictions, a majority of voters actually return their ballots in person, either to secure drop boxes or staffed vote centers, rather than by mail.
Source: Vote at Home: Policy and Research Guide, National Vote at Home Institute, https://www.voteathome.org/wp-content/uploads/2019/03/VAH-Policy-and-Research-Guide.pdf