How to write a resignation letter that's effective immediately? It's customary to give at least two weeks' notice unless you have a different agreement with the employer. 6.A one (1) week notice letter is written notification provided to an employer that an employee will no longer be working with the company within seven (7) days. You might want to mention some specific highlights or accomplishments from your time in the role. I would like to inform you of my intention to resign from my position as XXX at XXX effective DATE. I am resigning from the position of sales associate due to personal reasons.