Some useful phrases to use:
* As required by my contract...
Normally used at the beginning, this is a clear reference to your employment contract that details the termination procedure, and shows that you have read it.
* I would like to express my sincere gratitude...
A nice formal way of saying thank you for what your old company had done for you.
* I wish all of you a prosperous future...
A good salutation to make at the end of your letter, showing your concern about the future for your old company.
* May I take this opportunity to wish you all the very best for the future...
Another good way to finish the letter is to say that you hope the future will be good for your old company, you never know, you might have to return!
Here's an example of an resignation letter.
a) Dear Mr. Smith [your direct boss],
b) I hereby confirm in writing my resignation from ABC Company because of family reasons. My last day of work would be on ...
c) I would like to express my sincere gratitude and thanks for all the support that I have received over the last few years, and for the enjoyable experience of having worked for your company.
d) I wish all of you a prosperous future.
[your handwritten signature]
撰文﹕Wall Street Institute 英語學院
Wall Street Institute (WSI)英語學院創立於1972年，是全球最具規模的國際英語專科教育機構，全球分校超過350所，遍及25個國家。每年，WSI平均幫助超過140,000學員成功提升英語水平，致力為全球英語教育作出貢獻。