The forms below may also be used. Acknowledgments. I want to congratulate you personally for completing your <x> year with < company name >.It has been a pleasure working with you. The message of appreciation should stand alone. Be brief, warm, and sincere. Need help giving notice to your Landlord? Try ATA's New Custom Letter Writing Service! Thank you very much. Write your letter from your personal perspective, but again, be concise and focus on your purpose:. Thank God for the people who unselfishly help provide assistance for a child to get a better, higher quality education.