You can do both. You should ALWAYS write a formal resignation letter that's about 3 lines at most, before talking to the manager. It just stops a ton of confu

You can do both. You should ALWAYS write a formal resignation letter that's about 3 lines at most, before talking to the manager. It just stops a ton of confusion, hope, etc. It allows that discussion to focus on "Do you want the two weeks?" and "What do you want me to do with those two weeks if you want them." Part of being a good employee is making things clear to your manager.