Send a congratulations letter to your friend or coworker who has received promotion telling that you are very pleased for him or her .
Dear Mr. Anderson,
I just wanted to offer you my congratulations on that great promotion you just received. I know how hard you've been working and how deserving you are of this recognition.
It's so nice when our hard work is justly rewarded. I'm very happy for you and hope that you'll be doing something fun to celebrate this special occasion. Enjoy your work as .
Jack M. Watson