convey sincere thanks(I would also ask you to convey my sincere thanks and congratulations to all of those other people in your company who contributed in any way to the Helping the Homeless Campaign. – Shaun Fawcett's business letters dimock)
words of gratitude(Examples
“Thanks for doing what you do!”
“You are appreciated for all you do. ...
“The work you do is important and so appreciated.”
“Sending a little heartfelt appreciation your way today!”
“Just wanted to express our deep gratitude for the dedicated work you do day after day.”ART Vancouver)
