A California rental application enables landlords to collect information on tenants before entering into a rental agreement. How to fill out the California Rental Application - Fillable Form?1. Gather personal and financial information. 2. ✓ A copy of the tenant's signed lease, tenancy agreement, or rent receipt showing the current rent. Each Individual Occupant Who is Responsible for Rent Payment. MUST Complete A Separate Application Form (California Residents 18 years or older Apply). SMOC's Rental Assistance Program offers subsidies to eligible families, covering 37 communities. The Residential Rental Unit Licensing (RRUL) By-law provides standards and regulations for rental units in the City of London. Who Should Fill Out An Application Form in California? All prospective tenants over the age of 18, applying to a property, should fill out a rental application.