[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
Thank you for notifying me that my company has been awarded federal grant #1234 for the next year. These funds will help quite significantly with all of our many ongoing research projects. In compliance with your requirements, I will complete regular documentation and updates on projects.
Thank you again for your highly valuable support of my research.
[Sender's first and last names]