Travelers to Thailand must have a passport valid for at least 6 months beyond the date of entry. Visas are not required for stays of up to 30 days for many nationalities, but it is important to check the specific requirements based on your nationality. Additionally, it's advisable to stay updated on travel advisories and entry restrictions for foreign visitors, as these can change. Vaccinations for hepatitis A, typhoid, and Japanese encephalitis are recommended for most travelers.