The experience letter format usually contains: It validates the employees working years in their previous company. To get a new job, this work experience letter is required. The letter states the experience of the individual in the company. What is an experience letter?Ī work experience letter is an official document or a certificate provided by the employer when their employee leaves the company. For reference, there are many experience letter samples available which can be used. This letter testifies the employee’s achievement and contribution when working for the previous company. And to authenticate this work experience, a work experience letter is required. The best thing that one earns from years of working is work experience.