This document is a formal notice demanding the release of a mechanics lien from the lien claimant, citing that more than 90 days have passed since the lien was recorded, thus making it unenforceable under California law. The sender expresses a desire to resolve the matter amicably but warns of legal action, including a petition for release and recovery of attorney's fees, if the lien is not released within ten days. It includes instructions for serving the notice to the claimant properly to avoid legal complications.