FWIW (and IANAL), I understand the situation in Germany to be something like this: it's not possible to obtain ownership ("Eigentum", as distinct from "Besitz" or possession) of stolen goods or counterfeit money, and if they are discovered, they will be confiscated and the police don't have to recompense you -- but you are, of course, free to bring suit against the shop that sold you those goods and demand that they give you something of worth in return for the money they took from you (or at least your money back).