An employee wishing to leave in good standing shall file a two (2) week written resignation with the appointing authority. State your resignation.In the opening paragraph, state that you are informing your employer that you will resign from your job in two weeks. Reason for Resignation. (Resignation Notice). I know in an office you provide a formal letter and give the notice 2 weeks in advance, but how do you do it in retail? Do you just tell them? A two weeks notice letter is crucial for several reasons. It demonstrates professionalism and respect towards the employer. Personal Reason 2Week Notice.