Signature requirements for mailed ballots allow election officials to verify a mailed ballot has been filled out by the correct voter. Signatures on file are compared with those on the envelope containing mailed ballots. Measures are in place to ensure ballots are as private as those completed at a polling booth. Mailed ballots are typically delivered to and picked up from the post office by two election office staff and transported in a secure container. These ballots are also processed by teams of election staff to ensure the integrity of the counting process.