Tenant Abandonment When a tenant vacates a rental property and leaves behind personal belongings, this is considered abandoned property. A landlord or property manager uses RPI Forms 581, 583 and 584 when a tenant abandons their property and leaves personal property behind.This guide will be your trusty map through the twisting corridors of California's abandoned property laws. Possession, and who claims a right of possession, may fill out a Claim of Right to. Possession form and give it to the sheriff. In California, a person can claim title to a piece of real property that they are not a titleholder to through adverse possession. Tenants sometimes leave behind personal property when they move out or are evicted. Get a complete understanding of squatters in California with Innago's comprehensive guide. However, Colorado law is clear on the effect of abandonment. Once you have a writ of possession, you can change the locks, clean out the property, and move forward with your rental.