absentee voting
postal voting
But for most expats, postal or proxy voting are the only options.
The proposal to revive proxy voting is also likely to inspire protest, particularly among conservative Republicans.
Such clubs have a longstanding practice of using proxy voting in their elections for their governing bodies.
 SMART Vocabulary: related words and phrases 
 Elections 
absentee
absentee ballot
absentee vote
absentee voter
absentee voting
enfranchisement
entrance poll
exit poll
first-past-the-post
flip
proportional representation
proxy
proxy vote
proxy voter
psephologist
voting
voting booth
voting machine
voting slip
whistle-stop