A person is trespassing if they enter the property of another without permission. A person can be trespassing without even realizing it, they do not need to be aware that they have entered another person’s property. A person is also trespassing if they cause an object to be deposited (thrown, pushed etc.) onto the property of another.
Trespassing can be both a civil infraction and a crime.
Criminal Trespass
A person commits criminal trespass when they knowingly do one of the below:
• Enter or remain unlawfully at a home, apartment, condo (residence)
• Enter or remain unlawfully in a residential yard
• Unlawfully looking into a residence and infringing on a person’s privacy (peeping Tom)
• Enter or remain on a valid mineral claim to take minerals
• Enter or remain to burn religious symbols of another
• Enter or remain in or on a critical public service facility (bus, rail, air transit providers, utility companies, natural gas companies etc.)
• Enter or remain in any nonresidential structure
• Enter or remain in any fenced commercial yard
• Remaining on property after being asked to leave
• Entering or remaining on tracks of a railroad company
Laws
A.R.S 13-1504 Criminal Trespass in First Degree