Judges require proof of enrollment in any and all programs that are conditions of DUI probation. This includes classes, community service, Cal-Trans, etc. Defendants must also provide proof of compliance of other terms of probation, such as payment of fines and/or restitution. Failure to provide such proof can result in the issuance of a California bench warrant for the defendant's arrest. A bench warrant authorizes law enforcement to locate, arrest, and bring the defendant before the issuing judge. In addition, once the defendant appears before the court, the judge will likely sentence him/her for a probation violation for disobeying a court order.