You should send a thank you letter after any professional contact has been made. Learn how to write an employee appreciation letter with these templates and examples.Download the template for free (PDF or Word). I would like to express my sincere and heartfelt thanks for the wonderful and professional treatment received therein. This manual is designed to assist hiring managers with appropriate hiring processes and Human Resources practices. Your employees work hard. Use our employee appreciation letter templates to thank your employees for their effort. To Request Police Department Public Records not available Online. The message of appreciation should stand alone. Be brief, warm, and sincere.