Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).An employee appreciation or thank you letter is a formal message from an employer that recognizes the former's contribution to the company they work for. Below you will find sample appreciation letters to send or email an individual or individuals who have helped you at work. The message of appreciation should stand alone. Be brief, warm, and sincere. Learn how to write an employee appreciation letter for different circumstances, work relationships and company cultures using our templates and examples. Dear So and So, I wanted to drop you a note to express my thanks for all of your efforts to get this done. I really appreciate it. Sample from everyone.