Dear (Mr./Mrs./Miss/Ms.) followed by last name,
Your introductory paragraph should state your reason for writing in a brief manner. Express your congratulations on the recipient’s achievement, and state where you heard the good news.
The body of your congratulations letter may further express your joy in the recipient’s accomplishment, promotion or award. Briefly touch on the significance of their achievement, and how it may impact them in a positive way in the future. You may want to include a few words of advice and encouragement to keep up the good work.
In closing, congratulate the recipient once more and express your best wishes for their continued success.
Sign your name by hand just above the typed signature. By writing a congratulations letter promptly, the recipient will feel proud knowing that their achievement is recognized by others who may be an important part of their business life.