Learn how to use an effective letter of appreciation to show your gratitude for job opportunities, job search referrals, and other kindnesses. Learn how to write an employee appreciation letter with these templates and examples.Download the template for free (PDF or Word). Be specific about why you are writing them and how it is positive for your business. Thank them genuinely for their support and business. A thankyou letter is a typed or written note that expresses your words of gratitude to somebody for some reason. Thank you for your assistance. How thoughtful of a person are you, when you take the time to thank everyone who showed support during your darkest hour. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. On behalf of the entire team at < company name >, I would like to acknowledge your invaluable contributions to the workplace.