8th February ， 20xx
Dear Mr. Wong，
Re: Resignation from the post of Settlement clerk
I would like to let you know how much I have enjoyed my last three years at the Hero Company. Hero Company is an invaluable place for enriching my knowledge about financial field， I enjoyed working with my colleagues and I have learned so much things here.
Because I would like to take a new challenge and I want to meet people from all walks of life， I have accepted an offer from an Insurance firm as a Personal Financial Consultant. I would therefore appreciate it if you would accept my resignation effective from 8 March， 20xx.
I would be very much obliged if you would kindly give me a reference letter before I leave. Thank you for all that you have done to make my work here both interesting and enjoyable.
Yours sincerely，
Alexander Fung
2月8日，20