TN, I think Kaybee and anon answered for me pretty well. No it's not the law in Alaska, nor in Washington State, or Oregon, all of which I've worked in and received the same treatment.
One other thing to think about is that you'd be encouraging an employee to be deceptive if you didn't provide this. For instance, if a bonus or vacation or...well heck whatever were in the works during the two week period, I'd "not" give notice, even though I'd knowingly be leaving the bank because I would know that the bank would be planning on punishing me for leaving. I'd just wait out the two weeks, take the bonus and then give a fake two weeks notice, knowing I'd be leaving in a day. Silly stuff really if you value any of your employees.
For the person who worries that folks take stuff previous to the two weeks....actually that sounds like it makes sense, but it really does not happen. Think of my previous positions...Private Banker and commercial lender. I don't need to xerox my client files to know who my "good" clients are and who I'm going to prospect if I go. First of all, a reputable bank would fire you for bringing in proprietary information from the old bank if they saw it, and secondly, a good banker knows who to call and has adequate access to a phone book. There really isn't a need for anything else
