I recently put in my two-weeks notice and prepared a resignation letter as is generally expected. It was short, to the point, and did not provide much more than "I'm leaving, you've been a great boss, let me know how I can help transition." I see my boss every day and we get along well, so it was my intention to get across most of my points verbally.
When I walked into his office to talk, that's exactly what happened. We talked, he didn't do much more than glance at the letter before putting it in his desk. I provided the letter as more of a formality, but the formal way to resign at our company is to submit an online form. I felt like the letter didn't do much besides pass between hands.
I've always thought of a resignation letter as something mandatory you have to do when you leave a job, but is this always true? Is it ever acceptable (particularly in my situation) to just not prepare a letter?