Dominicans cast their votes for president on Sunday, giving the incumbent party candidate enough votes to avoid a runoff. But the opposition candidate refused to concede, alleging vote-buying fraud.

A large diaspora vote could influence the Dominican Republic’s May 20 election. The same may not be true for the Mexican and Venezuelan elections to be held this year.

Most Latin American countries allow for overseas voting. AS/COA Online looks at expat voting laws and the impact of these ballots on elections.