In Alcatraz Masonic Hall Ass'n v. U.S. Fidelity & Guaranty Co., 3 Cal. App. 338, 85 P. 156 (Cal. Ct. App.. 1906), the owner and contractor entered into a $ 16,300.00 construction contract which was bonded by a surety company. 85 P. at 156. The owner and contractor subsequently agreed to an alteration of the construction contract which increased the total cost by $ 315.00. Id. at 157. The surety was not notified of the changes and the trial court entered a judgment completely exonerating the surety due to the unapproved change. Id. at 158.