Prob. Code, § 3802

(a) The nonresident fiduciary shall produce and file one of the following certificates:

(1) A certificate that the fiduciary is entitled, by the laws of the place of appointment of the fiduciary, to the possession of the estate of the nonresident. The certificate shall be under the hand of the clerk and seal of the court from which the appointment of the fiduciary was derived and shall show a transcript of the record of appointment and that the fiduciary has entered upon the discharge of the duties of the fiduciary.

(2) A certificate that the fiduciary is entitled, by the laws of the place of residence, to custody of the estate of the nonresident, without the appointment of any court. The certificate shall be under the hand of the clerk and seal of either (i) the court in the place of residence having jurisdiction of estates of persons that have a guardian, conservator, committee, or comparable fiduciary or (ii) the highest court in the place of residence.

(b) In the case of a foreign country, the certificate shall be accompanied by a final statement certifying the genuineness of the signature and official position of (1) the court clerk making the original certificate or (2) any foreign official who has certified either the genuineness of the signature and official position of the court clerk making the original certificate or the genuineness of the signature and official position of another foreign official who has executed a similar certificate in a chain of such certificates beginning with a certificate of the genuineness of the signature and official position of the clerk making the original certificate. The final statement may be made only by a secretary of an embassy or legation, consul general, consul, vice consul, or consular agent of the United States, or a diplomatic or consular official of the foreign country assigned or accredited to the United States.