To boost turnout in US elections, many states have introduced alternative or convenience systems for casting votes. Overall three methods are used:
• 39 states and the District of Columbia allow early voting in person during a designated period before Election Day, without the voter needing to provide any justification for voting early.
• All states mail absentee ballot papers to voters at their request (justification is required in 20 states).
• Postal ballot papers are automatically mailed to voters eligible for mail voting. (Five states use such voting for all their elections: Colorado,
Hawaii, Oregon, Utah and Washington).