European surety bonds can be issued by banks and surety companies. If issued by banks they are called "Bank Guaranties" in English and Cautions in French, if issued by a surety company they are called surety / bonds. They pay out cash to the limit of guaranty in the event of the default of the Principal to uphold his obligations to the Obligee, without reference by the Obligee to the Principal and against the Obligee's sole verified statement of claim to the bank. Through a surety bond, the surety agrees to uphold—for the benefit of the obligee—the contractual promises (obligations) made by the principal if the principal fails to uphold its promises to the obligee. The contract is formed so as to induce the obligee to contract with the principal, i.e., to demonstrate the credibility of the principal and guarantee performance and completion per the terms of the agreement. The principal will pay a premium (usually annually) in exchange for the bonding company's financial strength to extend surety credit. In the event of a claim, the surety will investigate it. If it turns out to be a valid claim, the surety will pay and then turn to the principal for reimbursement of the amount paid on the claim and any legal fees incurred. In some cases, the principal has a cause of action against another party for the principal's loss, and the surety will have a right of subrogation "step into the shoes of" the principal and recover damages to make up for the payment to the principal. If the principal defaults and the surety turns out to be insolvent, the purpose of the bond is rendered nugatory. Thus, the surety on a bond is usually an insurance company whose solvency is verified by private audit, governmental regulation, or both. A key term in nearly every surety bond is the penal sum. This is a specified amount of money which is the maximum amount that the surety will be required to pay in the event of the principal's default. This allows the surety to assess the risk involved in giving the bond; the premium charged is determined accordingly. Surety bonds also occur in other situations, for example, to secure the proper performance of fiduciary duties by persons in positions of private or public trust.