How To Write A Congratulations Letter . Dear maggie, congratulations on the completion of the construction of the new marketing wing of xyz. Come up with an appropriate salutation to start your letter. Congratulation Letter Contoh Letter from letternay.blogspot.com We appreciate the contributions and efforts that your service years present. There is no set timeline for when you can send this letter to other professionals. Sending congratulation messages or card writing warm congratulations wishes can be the perfect way to congratulate someone for something great.your best wishes and congratulatory words can melt their heart if you use them properly.