What is the easiest way to obtain a COVID-19 vaccine certificate in Thailand for international travel?

To obtain a COVID-19 vaccine certificate in Thailand for international travel, start by checking with the facility where you received your vaccination, as they often can provide the necessary documents. For those with a 13-digit Thailand vaccination ID, the Mor Prom app is recommended for obtaining and printing an International COVID vaccination certificate. Alternatively, one user shared their experience of receiving a vaccine passport at a local health department for a small fee after their booster shot.