Sample Congratulation Letter for Anniversary of his Service https://www.lettersfree.com/sample-congratulation-letter-for-anniversary-of-his-service/ Sample Letter to Congratulate on Anniversary. Congratulate an Employee on the Anniversary of His Service Letter Template, Format. #Sample #Letter #lettersfree #Employee #Template #Format #SampleLetter #CongratulationLetter #LetterTemplate #LetterFormat