Oregon Revised Statutes Remedies and Special Actions and Proceedings § 33.530

(1) When a bond or an irrevocable letter of credit of any personal representative, guardian or conservator is terminated upon the issuance of a new bond or irrevocable letter of credit to the personal representative, guardian or conservator by a new surety or letter of credit issuer, the former surety or letter of credit issuer shall not be liable on the old bond or irrevocable letter of credit for any acts or omissions of the personal representative, guardian or conservator which occur after the issuance of the new bond or irrevocable letter of credit.

(2) A new surety for a personal representative, guardian or conservator who issues a new bond or irrevocable letter of credit after the termination of a previous bond or irrevocable letter of credit written by another surety or letter of credit issuer for a personal representative, guardian or conservator shall not be liable for any acts or omissions of the personal representative, guardian or conservator which occurred prior to the issuance of the new bond or irrevocable letter of credit.