感謝信 (Letter of Thanks)是外國政府機構或個人的關心、支持、幫助或熱情款待表示感謝的對外函件。其具體格式和要求與邀請函相同。
　　 例文　Date and Place
　　 Mr.____
　　 Minister of _____
　　 (Address)
　　 Beijing,China
　　 Dear Minister,
　　 I am writing this letter to thank you for you warm hospitality accorded to me and my delegation during our recent visit to your beautiful country. I would also like to thank you for your interesting discussion with me which I have found very informative and useful.
　　 During the entire visit, my delegation and I were overwhelmed by the enthusiasm expressed by your business representatives on cooperation with China. I sincerely hope we could have more exchanges like this one when we would be able to continue our interesting discussion on possible ways to expand our bilateral ecomomic and trade relations and bring our business people together.
　　 I am lookingforward to your early visit to China when I will be able to pay back some of the hospitality I received during my memorable stay in yur beautiful country. With kind personal regards,
　　 Faithfully yours,
　　 (Signed)
　　 Mr.___ Minister of Economic Cooperation
　　 PLACE