Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).The message of appreciation should stand alone. Be brief, warm, and sincere. Get your guide to writing donation thankyou letters supporters will remember and more thoughtful ideas to show appreciation. Your employees work hard. Use our employee appreciation letter templates to thank your employees for their effort. Dear Sponsor: Thank you for your kindness and support. I am very grateful for it and wish you and your family the very best. Your employees work hard.