感谢信：感谢信是受到对方某种恩惠，如受到邀请、接待、慰问，收到礼品及得到帮助之后，而表达感谢之情的信函。
格式：１.称谓。
２.说明为什么要感谢。
３.再次表示致谢、问候。
４.署名、日期。
中文感谢信范例：
感 谢 信
ＸＸ公司并ＸＸ总经理：
首先让我们向您致以衷心的感谢。
日前，我们中美贸易和投资洽谈会青岛分团正着急为赴美选带什么礼品时，是您总经理毅然伸出友谊的手，ＸＸ公司的姑娘们昼夜加班，赶制出一份丰厚独特的礼品，使我们深深感到，ＸＸ公司的花边美，礼品更美：ＸＸ公司的姑娘们手巧，心灵更美。
让我们再次感谢总经理和ＸＸ公司姑娘们的支持和诚挚友情。
此致
敬礼
分团
Ｘ年Ｘ月Ｘ日
英文感谢信例文
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 epresentatives 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 economic and trade relations and bring our business people together.
I am looking forward 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