In Sweden, voters may cast their votes in advance before election day at any Swedish post office, and at care facilities (hospitals, elderly homes), prisons etc. Disabled people who cannot go to the polling station or to any other vote reception place may vote by “messenger”, where the voter prepares their vote in secrecy in presence of a witness and a messenger (see Swedish Elections Act). Swedish citizens abroad may vote in advance at Swedish foreign missions or by mail. Mail voting from abroad is regulated by a special legal act and requires special material (Mail Voting in Certain Cases Act). The voter prepares the vote in secrecy in presence of two witnesses. The voter and both witnesses must all sign a special outer envelope (sealed) before the voter sends the vote in a special window envelope to the Election Authority in Sweden.