> or the ballot could have a "receipt" section you tear off and keep It's been a few years, but doesn't California's "vote by mail" do this? You get the ballot

> or the ballot could have a "receipt" section you tear off and keep It's been a few years, but doesn't California's "vote by mail" do this? You get the ballot in the mail, you vote, you sign and date, you tear off the half-inch strip of paper off the top, and mail it back. You keep the narrow strip of paper if you want.