Dear ….., This will confirm my resignation as (your title) at (your company). I have accepted a position as (your new title) at (company name). I am looking forward to my new position and the challenges that await me.
My last day of work will be (date), which should allow me plenty of time to finish ongoing projects and to turn over my position to my replacement. Please feel free to contact me at any time should you have any questions regarding my past work. I hope that the transition will go smoothly for everyone.
My experience with (your company) has been very rewarding. I appreciate having had the opportunity to work for such a fine company. I wish you and the organization continued success.