err. Wouldn't it still be easy to fake? Just mail a blank cd to yourself leaving the envelope unsealed. Burn a fresh cd with your computer clock back dated, pop it into the envelope and seal it. Voila, one sealed and dated envelope with a cd in it that's also back dated. Of course, you could always do the same with paper, just put a set of blank A4 in instead of a cd. Is there any cases where poor man's copyright has stood up to scrutiny? Would just like to add, according to a selection of websites you have to register your copyright in the US before you can bring a case anyway so 'poor man's copyright' really is valueless.