What is good wording for appreciation letters?

Answer by  timeismoney (994)

It is with deep appreciation that I write this letter to recognize you substantial contributions to our efforts. You have singularly dedicated yourself to our mission in ways that I know took time and energy from other activities.

Answer by  barkley (951)

I want to take this opportunity to thank you for the great support you provided to XYZ. Your charitable contribution made this event successful. Sincerely, XYZ.