Congratulation letter is written to praise for the individual success, this gesture helps to maintain personal as well as professional bond.
You can write to convey your congratulations to your family, friends, or business associates on their success or achievements. It is a way of celebrating their success and partaking in their happiness.
You can write about the qualities that have helped the individual to achieve success. The letter should be written with enthusiasm and happiness. You can write in how happy you are about hearing the success.
Maintain a positive and warm tone without sounding pompous and condescending.
Keep the letters simple and short
Body of the congratulation should include cheers and heartiest best wishes on the occasion of happiness and joy. Such letter can be written to the colleagues and senior officials to wish them luck on their promotion, retirement and increment.
Complete the letter by wishing again and pay thanks and regards