California Code, Government Code - GOV § 17051.5

A state agency shall notify the Treasurer not to pay a warrant drawn by the Controller upon that agency's request whenever that agency has reason to believe that the Controller has drawn or is about to draw his or her warrant without legal authority, for a larger amount than is owed by the state, or in a manner not in conformity with the regulations adopted by the Department of General Services for the presentation and audit of claims. Upon notification from a state agency as described in this section, the Treasurer shall refuse payment of the subject warrant until he or she is otherwise directed by the agency or the Legislature.