After full payment of defaulted taxes against which a certificate of lien has been recorded, an Unrecorded Release of Lien notice will be mailed to the owner. Need to file a mechanics lien in Contra Costa County?Here's what you need to know to record your lien with the Contra Costa County Recorder. The following is a list of some documents that may be recorded if they meet all requirements, and a description or definition of each document. This Notice of Intent to Lien form can be downloaded and used to help speed up payment on a construction project in California. Official Forms for Viewing and Downloading.