Why do some people receive actual visas in their passports while others only get a PDF document?

The difference in receiving an actual visa sticker in a passport versus a PDF document for the Thai visa often relates to how the visa was applied for. When using the eVisa system, applicants typically receive a PDF document via email. In contrast, those who apply through a consulate in countries that do not have an eVisa system might receive a physical visa sticker. Both types ultimately grant the same benefits, and upon entering Thailand, travelers must show the eVisa document along with their passport.