CA Gov't Code Section 66451.13

Prior to recording a notice of merger, the local agency shall cause to be mailed by certified mail to the then current record owner of the property a notice of intention to determine status, notifying the owner that the affected parcels may be merged pursuant to standards specified in the merger ordinance, and advising the owner of the opportunity to request a hearing on determination of status and to present evidence at the hearing that the property does not meet the criteria for merger. The notice of intention to determine status shall be filed for record with the recorder of the county in which the real property is located on the date that notice is mailed to the property owner.