I'm fresh out of the box new to detecting (Garrett Ace 250) and am still in training mode in my backyard (just got my Bounty Hunter Pin Pointer today and my back is very grateful). I've watched some videos on asking permission of private homeowners to scout on their property. I think on one video the guy mentioned some type of form (waiver?) that he could have been used (but he didn't) so he was more or less protected from being charged for trespassing or property damage. Do such forms (or obligation on the part of the detector) exist? And are there forms on line that would be needed for permission to detect on government land (Parks, Rec Areas, Beaches, etc.). And with regard to both situations, are you bound by law to fork over anything really valuable you might find? If so, is there a dollar floor (i.e. $500 or greater)?