No state has witness requirements for the Federal Post Card Application (FPCA).
The following states have witnessing requirements for the Federal Write-in Absentee Ballot (FWAB):
- Alabama (2 witnesses)
- Alaska (1 witness)
- Virginia (1 witness)
- Wisconsin (1 witness)
Any required witness must sign in "Section 6. What additional information must you provide?" on the Voter Information page of the FWAB. To learn more, please refer to the state and territory information in the Voting Assistance Guide.