Trespass to Property Act of Ontario is provincial law in Ontario dealing with illegal entry into private and public property. As a provincial law, the penalties and mechanisms of enforcement are also provincial. This is important inasmuch as, under the Canadian system, criminal law is within the realm of the federal authority, so anyone violating this Act would be subject to quasi-criminal not full criminal enforcement. The Act is an attempt to put on the statute books what was formerly recognized by the common law. It is most often used by private property owners to keep unwanted individuals off the property. There are many methods of notifying unwanted individuals that they have been banned (for future access) but the most common is a personal notice to the offender.