Dear [Recipients Name],
Well done for dealing with the Clarkson account in such a professional manner. Others on the team had lost all hope for a successful conclusion but you have turned around the account into one of our greatest successes. We have enclosed a bonus in your pay check as recognition for all of your hard work.
I am sure that we have many more impressive successes to come.
Sincerely,
[Senders Name]
[Senders Title] -Optional-
[Enclosures: number] -Optional-