Cal. Lab. Code § 3721
The director shall provide the employer with a certificate of cancellation of lien after the employer has paid to the claimant or to the Uninsured Employers Fund the amount of the compensation or benefits which has been ordered paid to the claimant, or when the application has finally been denied after the claimant has exhausted the remedies provided by law in those cases, or when the employer has filed a bond in the amount and with such surety as the appeals board approves conditioned on the payment of all sums ordered paid to the claimant, or when, after a finding that the employer was prima facie illegally uninsured, it is finally determined that the finding was in error. The recorder shall make no charge for filing the certificates of lien, for filing amended certificates of lien, or for cancellation when liens are filed in error. Cancellation of lien certificates provided to the employer may be filed for recordation by the employer at his or her expense.
Ca. Lab. Code § 3721