Your appreciation to the donor for their generosity. Learn how to write an employee appreciation letter with these templates and examples.Download the template for free (PDF or Word). I want to thank you for interviewing me yesterday for the Assistant Editor position. I would like to express my sincere and heartfelt thanks for the wonderful and professional treatment received therein. Below you will find sample appreciation letters to send or email an individual or individuals who have helped you at work. Write thanks you letters to your buyers, those who do add-ons and awards sponsors, along with project leaders, advisors, parents and anyone who has helped you. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. You deserve all the credit.