How To Write A Two Week Notice Letter For Job . When you are writing a two weeks notice letter sample, keep in mind. Your letter should concisely explain your resignation and from what date it will be effective. 40 Two Weeks Notice Letters & Resignation Letter Templates from templatelab.com What is a two weeks notice letter. This date should be included in the letter and should be exactly two weeks from when the letter was sent. Explain why you are resigning.