Should we be mentioning voting by mail in our "please vote!" letters?
No. Please refrain from trying to describe electoral processes or rules in the handwritten parts of your “please vote!” letters. Each state has its own election framework, and as we saw in 2020, these policies are subject to change. It’s much better to err on the side of caution rather than providing what could become outdated or incorrect information. Stick to nonpartisan messages about voting, and please refrain from giving advice on how to do so.
If you are working on "vote by mail" letters, your handwritten message can focus on why you vote. The pre-printed text provides information on how to request a mail-in ballot.