1234, West 67 Street,
Carlisle, MA 01741,
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Jimy Ortan,,
Lately, we have been dissatisfied with the quality of work that your maintenance specialists do. We brought this to your attention a number of times already, but still got poor results. In effect, we have decided to cancel our agreement with you. We are assigning a different group to conduct the routine care and check-up of our company trucks. Kindly return all the tools and key duplicates to our front office staff within a week of receiving this letter.