For example, a contract may cover a certain period of time and only allow for early termination if you have poor service. In this case, you certainly don`t want to write something like, „Although your service has been excellent… If there is a legitimate service issue, state it briefly and cite the part of the agreement with which you can terminate under these terms. Otherwise, it is better not to work. I am writing this letter to inform you, unfortunately, that we are annuating the sales contract we signed on ____ (Date) for a period of ________ (specify the duration). This decision is due to the constant complaints of our customers regarding the quality of your product. .