Oregon Revised Statutes Insurance § 742.362

(1) A surety wishing to terminate the liability undertaken upon any bank depository bond or undertaking given to guarantee the safekeeping and return of any public moneys deposited in the bank may do so by giving notice of election so to do to the principal and to the official whose duty it is to approve such bond or undertaking. A surety is released from any future liability upon any such depository bond or undertaking at the expiration of 30 days after the giving of such notice.

(2) Where the form of depository bond or undertaking given to protect any public moneys is prescribed by statute or regulation the right to cancel such bond or undertaking shall be expressed in such bonds or undertakings by adding a paragraph to the prescribed form in substantially the following form: “The above-named surety shall have the right to terminate any future liability hereunder by serving written notice of election so to do upon the principal and (here insert the official title of the state or county treasurer, or other officials whose duty it is to approve such bond), and thereupon the said surety shall be discharged from any future liability hereunder for any default of the said principal occurring after the expiration of 30 days from and after the service of such notice.” The purpose of such cancellation privilege is to afford the surety a means of obtaining definite release from its liability.

(3) Any official or officials whose duty it is to approve any bank depository bond given to protect the deposits of any official moneys, on the official's own motion or upon written request from any bank in whose behalf such a bond is issued, may terminate the future liability on the bond by giving notice to the surety of elections so to do. Thereupon the surety shall be discharged from any future liability upon any such depository bond for any default of the principal occurring after the expiration of 30 days from and after the service of such notice.