Dear …
Re: __(Type of Contract)__ - __(Reference Name/No.)__
Please allow this letter to serve as __(Name of Organization’s)__ official written request to cancel the above mentioned __(type of)__ contract effective__(date)__. We have chosen to exercise our right to allow this contract to terminate on __(date)__ renewal. As outlined in the terms of the contract, this written notification is well within the __(#)__ days required for notice of termination.
We thank you for your past service and look forward to receiving your acknowledgement of this request.
Yours truly,