A Preliminary Change of Ownership Report (PCOR) is requested whenever an document evidencing a change of home is shot. While a PCOR is not received, the Assessor Department will mail you a Change of Holding Statement (COS). The owner for of property is vital to complete or return the form, under Section 480 away which Takings and Taxation Code. Failure to storage a completed COS within 90 days will result inside an penalty bill of up to $5,000 for most residential characteristics. Property Documents | CO Clerk Pen Department