Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).I am writing to express my deepest gratitude for your generous financial support. Your financial aid has relieved a significant burden off my shoulders. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. Inova offers financial assistance to patients who need help with their medical bill. Write sincerely with an active voice. _. I (sponsor name). Agree and certify that I will provide full financial support for (student name). Financial Donation Form.