To do this, you first need an Abstract of Judgment. Need to file a mechanics lien in San Diego County?Find the information you need to record your lien with the San Diego County Recorder here. A lien prevents a person from selling, transferring, or refinancing real property owned in the county where the lien is recorded until the lien is satisfied. The first step you need to take if you're filing a California Mechanics Lien is to prepare a California Mechanics Lien form. You will need to complete a title search to verify the actual owner and acquire a legal description of the property from the deed. Fill out the form to download your free California Claim Of Lien Form.