[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 very much for your letter, stating that my application for admission to the undergraduate program at the University of Northern Plains has been accepted and approved. It is an honor to notify you that I intend to enroll as an undergraduate, with my coursework beginning as of the fall semester of this year.
Please let me know what the next steps are, and I will be pleased to proceed with planning. I look forward to being a student at your fine university. Thank you again.
[Sender's first and last names]