Ahead of the US midterm elections on 3 November, President Trump continues to make unsubstantiated claims that mail-in voting leads to widespread fraud. This was reported by Qazaqyia.kz citing BBC News.
US states have different voting rules and regulations, but every state allows some postal voting, a method the president says he has used in the past.
BBC Verify visited an election centre in Maryland to get a behind-the-scenes look at how mail-in ballots are processed and counted.
The video was produced by Mabel Pickering, with graphics by Sally Nicholls.