Learn how to write a response to a resignation letter and use our examples and template to help you write your own. There is no standing policy against rehiring employees who quit.There is an appropriate job opening for you to fill. If you regret the loss of the employee, but have a positive feeling about the arrangement, allow the letter to express your sincere regret. Such resignation is effective when the notice is delivered. This is with deep regret that I am submitting my resignation letter from the position of (your designation) effective immediately. The long answer short is that your employer can "phrase" this however they want. He's beginning to think he shouldn't have left his old job. Liam is not alone in second-guessing his decision to change jobs. Quitting isn't all it's cracked up to be.