absentee vote

剑桥词典

a system of voting in which people send their votes by post when they cannot be present at an election
（无法到达选举现场的人通过邮寄方式进行的）缺席投票制，邮寄式投票制

a piece of paper on which people mark their votes and then send them by post when they cannot be present at an election
（无法到达选举现场的人通过邮寄方式所投的）缺席选票，邮寄式选票
比较
absentee ballot 返回 absentee vote