I'm my experience, I found its customary to give at least two weeks notice when separating from your employer. How does this work when you're in a position with access to all systems?
There have been two other individuals in my time at my current employer that quit on the spot. When I enquired about this, a coworker informed me that this is normal because of the access those individuals had.
I would like to leave on good terms and I'm not sure what the etiquette is in these situations.