1. Normally, companies do not terminate an employee who have resigned and serving notice period. 2. This letter accepts an employee's resignation, noting their last day will be after serving out their required notice period according to their contract.If an employee's resignation arrives before your chance to dismiss them, your first urge may be to reject it. But are you actually able to do this? Generally, the higher your grade the longer your notice period - senior post holders could be required to give up to three months' notice. Trending Insight: More junior employees give one month's notice, while more senior employees offer three months's notice. But, the contract is king. If you want to leave your job you will have to give notice of resignation to your employer.