This simple, generic resignation letter can be used for any position and any employment situation.
November 17, 2014
Terry Bossname
Company Name
Company Address
Dear Mr./Ms. Bossname,
It is with regret that I inform you that I must tender my resignation.
I could elaborate, but I'm sure that you know what has led to this decision.
I wish you and (company) success in the future.
Sincerely,
Your Name