Voting By Mail? You can now submit your Ballot Return Envelope at any of the Chicago Board of Elections' Secured Drop Boxes. Chicago voters may use any Secured Drop Box in the city. Please note: whether you use the US Mail or a Drop Box, you must use the signed and sealed Ballot Return Envelope with your name on it to submit your ballot. Drop Boxes will be assigned in the near future for the March 19, 2024 Presidential Primary Election.