Here we go again, another buyer stumped by an apartment complex who states the written notice wasn't tendered properly.  Never mind the client knew exactly what date and time the notice was provided-- without a signature or some type of written confirmation, the landlord or property staff can assess charges if they say there wasn't proper notice.  Since the tenant is the one who stands to lose, it is wise to protect yourself.  Always, always, ask for a signature and date on a copy of your notice--regardless.  This way, you as a renter are assured that no undue fees can be charged you or applied to your credit reports, and you can move without any added consequence!