California Code, Business and Professions Code - BPC § 8554

No individual engaged in the business or acting in the capacity of an operator may bring or maintain an action in any court of this state for the collection of compensation for the performance of any act or contract without alleging and proving that he or she was a duly licensed operator at all times during the performance of such act or contract.

No firm, partnership, corporation, association or other organization or combination thereof engaged in the practice of structural pest control may bring or maintain an action in any court of this state for the collection of compensation for the performance of any act or contract without alleging and proving that it was a duly registered company at all times during the performance of the act or contract.

Nothing herein shall prohibit the bringing or maintaining an action for the collection of compensation in the event of a suspension or revocation of a license or company registration by the board, if the order of suspension or revocation authorized the performance of the act or work, compensation for which the action is brought or maintained.