According to the Embassy of the United States in London, a Basic Travel Allowance refers to a scam under which foreign nationals request money from U.S. citizens for travel to the United States, claiming that a BTA is required under U.S. law. The embassy warns citizens against the scam.
According to the U.S. Embassy, the scam may ask for similar funds for travel allowance or funds. As the BBC details, the scam often targets owners of travel services and accommodations, requesting that owners pay the BTA to travel agencies, who promise to repay the amount when they book rooms for guests. According to the BBC, the scam is also prevalent on dating sites.