A simple yet powerful tool, these letters can express gratitude, boost morale, and improve job satisfaction. Learn how to write an employee appreciation letter with these templates and examples.Download the template for free (PDF or Word). Your employees work hard. Use our employee appreciation letter templates to thank your employees for their effort. WHEREAS, both of the parties to this Agreement are desirous of reaching an amicable understanding with respect to the employer-employee. A formal appreciation letter or an email to your employees expresses your gratitude for their contribution to your business. 5 Employee appreciation letter best practices 1) Be timely. A letter of appreciation is a formal or casual way for employers to thank employees for their hard work. Explore our templates now!