I have resigned on _____ date because ______(reasons). Can anybody give me format of Resignation letter and Experince certificate?Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide. Talk to the new company's HR and tell them that your previous company will issue you the experience certificate in 45 days time. I would like to request that you please issue me an experience certificate so that I can begin the process of joining another company. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. The forms below may be printed out and used for requests through eFile Texas. Attorneys should use this Service Request Form as the lead document. Learn how to write a professional resignation letter with our step-by-step guide and easy to use templates.