You can never be held responsible for something you receive in the mail.... if you could, then what happens if I send Kiddie Porn to Dubya at the White House? Does he get arrested?

On that same note, if you receive something (a product - lets say a shipment from Amazon or something) in the mail that you didn't order, you have every right to keep it - provided it has your address on it and was not misdelivered

Deny Deny Deny, then deny some more when applicable