Your letter should formally acknowledge the employee's resignation, confirm their last day of employment and wish them the best. This sample resignation letter is available for use on UpCounsel.Does my employer have to acknowledge my resignation letter? This letter acknowledges an employer has received and accepts an employee's notice of resignation, copies of which should be sent to the resigning employee. The following form may be used when the person designated as registered agent in a registered agent filing is an individual. In the first paragraph of a resignation acceptance letter, employers should directly acknowledge the employee's intention to resign. Present the options as set out in the report. I would specifically like to thank the review team, and acknowledge the hard work of: Detective.