Source? My understanding is that at-will states have a default presumption of at-will employment in the absence of a contract, but parties are free to contract alternatively. Which states invalidate mutually agreed upon notice periods?
It’s not illegal, but from what I understand an excessively long notice period would very likely be shot down by the courts. There are a lot of arguments to be made here (for example, what’s stopping an employer from putting a 5 year notice period from day 1 if they can put an arbitrary one?). I imagine if companies do increase it or introduce one in general, it would be closer to 1 month, maybe 2, not 6.
