How To Write A Letter Cancelling A Contract . The reasons for this are the delay in the delivery of supplies by your company, which has had a negative impact on our business. There are different types of cancellation documents you can compose such as an insurance cancellation letter, gym. Letter To Cancel Contract For Your Needs Letter Template Collection from simpleartifact.com To write a cancellation letter one must be sure about the decision of not requiring a particular service. Keep your letter to less than 4 paragraphs. [describe the items that you are cancelling the contract for] our contract is being cancelled for the following reasons: