I tested this myself,i wanted a beer at a local establishment,placed a 1 kilo 30 dollar face value coin,australian.on the counter,grabbed the beer walked of,sat down to drink my beer,was harassed by the barperson,i hadnt paid for my beer and she was calling the police! she did.when the police came i had already left the establishment.they tracked me down in the street.30dollar face value kilo silver coin in hand.told me of the claim made against me.i explained to them clearly,that the coin they were holding,was infact australian legal tender,and that i had simply told the woman,keep the change.they were even more astonished when i told them the metal content value.i said well if the women wasnt so quick to judgement and seeing the worst in what i had done,she would have had a healthy tip.they handed me the coin back,smiled wished me well and thanked me for the informative moment.i,m just glad i wasnt on a pub crawl at the time.