This page contains answers to common questions about integrity and ethics in City government. I just opened my letter.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. This page includes ethics information and resources for City employees. Our office provides education and informal guidance on ethics rules for City employees. Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word). The letter states that the businesses are required to post updated Federal labor law posters in the workplace or will face significant fines and penalties. Coworkers write and sign letters for each other all the time. Thank you again. Sincerely.