69 N. Grant Street, Mid Lake City,
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Mather Smith,
I would like to express my thanks at the great work you and your team have put in on the Carpenter Project. The client has expressed their delight at a well worked presentation and overall project. The effort and additional time that have been put into your work have not gone unnoticed and the dedication of you and your team is greatly appreciated.