To obtain Cambodia tourist visa, applicants should submit their US passport valid for at least 6 months; a fully accomplished and signed visa application form; recent passport-size photograph; and a copy of the applicant's travel itinerary.
For a Cambodia business visa, passport requirement should be up to 6-month validity. Other documents needed for processing include the visa application form, recent passport-size photograph, travel itinerary and a business letter of financial responsibility typewritten on the company's official letterhead. The letter should be addressed to the Embassy of Cambodia, Visa Section, Washington, DC. It should explain in detail the purpose of visit and a guarantee of financial support for the applicant during the visit. The Embassy must also receive a letter of invitation from the host company or organization to be visited in Cambodia. Cambodia visa processing time is usually not less than 5 business days.