Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).Start with a greeting. Share your gratitude with specific examples. The message of appreciation should stand alone. Be brief, warm, and sincere. Governor JB Pritzker is glad to assist Illinois residents in honoring their accomplishments or celebrating milestones. Requests must be made at least 30 days. Mayor's Office Letter Request Form. Requests must be made 10 business days prior to date the document is needed.