感謝信，是向對方表達謝意的書信。感謝對方的.關心、支持、幫助或熱情款待等。主要內容是說明感謝的事由並表示真誠的謝意。其寫作步驟建議採取三步走戰略，具體如下：
寫作三步走：
表示感謝說明事由再次表示真誠感謝
感謝信在寫作中需要注意的是：表達的感激之情要恰到好處，不要草率，也不要過於誇張。言辭應真摯、得體。建議在結尾儘量表達希望回報對方的願望，顯得更加真誠。
模板句型：
第一步：表示感謝
thank you so much for
i warmly appreciate your hospitality.
i am writing to express my thanks for
i am writing to extend my sincere gratitude/appreciation for
i would like to convey in this letter my heartfelt thanks to you for
第二步：說明事由
thank you very much for the gift you sent me. its one of the most wonderful gifts i got on my birthday.
i am writing this letter to thank you for your 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.
第三步：再次表示感謝
thanks again.
again, i would like to express my warm thanks to you! please accept my gratitude.
thanks again and i hope that i will have the opportunity to return/ repay your kindness.
i am looking forward to
