California Code, Civil Code - CIV § 8304

(a) The work of improvement for which the design professional provided services has not commenced.

(b) The landowner defaults in a payment required under the contract or refuses to pay the demand of the design professional made under the contract.

(c) Not less than 10 days before recording a claim of lien, the design professional gives the landowner notice making a demand for payment, and stating that a default has occurred under the contract and the amount of the default.

(d) The design professional records a claim of lien.  The claim of lien shall include all of the following information: