You need a negative COVID-19 test to get into most countries these days and it’s leading to tourists getting fake test results.
Sometimes you can’t get a test without symptoms or results take too long, so some travelers are literally buying counterfeit results at the airport or from travel agents, they’re seeing it in Brazil, France, and the U.K
Authorities this is dangerous and puts other passengers at risk, so expect test-result protocols to get stricter; some places have started forcing traveler to use a designated approved testing facility.