NOT in FL, 你可以攞郵寄再攞去投票,但郵寄後就當你已投,冇得改變主意
https://dos.myflorida.com/elections/for-voters/voting/vote-by-mail/
A voter who has requested a ballot may change his or her mind and vote in person. The voter should bring the ballot (marked or unmarked) to the polls to turn the ballot in and vote a regular ballot. If the voter does not bring the ballot to the polls for whatever reason, the Supervisor of Elections' office will need to confirm that the ballot has not already been returned and received. If the ballot has not been received, the voter will be allowed to vote a regular ballot.
If the ballot has been received, the ballot is deemed cast and the voter to have voted. If the voter believes the office is incorrect for whatever reason, the voter is allowed to vote a provisional ballot. The matter will then be presented to the canvassing board for determination. If it cannot be determined if the ballot has been received, the voter will be allowed to vote a provisional ballot. See section 101.69, Fla. Stat.