It's been a pleasure working with you for the past (number) months on the(name) project. You've been great to work with and we have appreciated the hardwork you have given to us. At this time, the (name) project is finished and weno longer have need for your services....
Письмо-отказ от дальнейшегосотрудничества
Dear(recipient's name),
It's been a pleasure working with you for the past (number) months on the(name) project. You've been great to work with and we have appreciated the hardwork you have given to us. At this time, the (name) project is finished and weno longer have need for your services.
Sincerely,
(your name)