Wash. Super. Ct. Civ. R. 44

(a) Authentication.

(1) Domestic. An official record kept within the United States, or any state, district, or

commonwealth, territory, or within a territory subject to the administrative or judicial jurisdiction

of the United States, or an entry therein, when admissible for any purpose, may be evidenced by

an official publication thereof or by a copy attested by the officer having the legal custody of the

record, or by the officer's deputy, and accompanied by a certificate that such officer has the

custody. The certificate may be made by a judge of a court of record of the district or political

subdivision in which the record is kept, authenticated by the seal of the court, or may be made by

any public officer having a seal of office or official custody of the seal of the political subdivision

and having official duties in the district or political subdivision in which the record is kept,

authenticated by the seal of the officer's office or the seal of the political subdivision.

(2) Foreign. A foreign official record, or an entry therein, when admissible for any

purpose, may be evidenced by an official publication thereof; or a copy thereof, attested by a

person authorized to make the attestation, and accompanied by a final certification as to the

genuineness of the signature and official position:

(A) of the attesting person; or

(B) of any foreign official whose certificate of genuineness of signature and official

position relates to the attestation or is in a chain of certificates of genuineness of signature and

official position relating to the attestation. A final certification may be made by a secretary of

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. If reasonable opportunity has been given to all parties to investigate the authenticity and

accuracy of the documents, the court may, for good cause shown, either admit an attested copy

without final certification or permit the foreign official record to be evidenced by an attested

summary with or without a final certification. The final certification is unnecessary if the record

and the attestation are certified as provided in a treaty or convention to which the United States

and the foreign country in which the official record is located are parties.

(b) Lack of Record. A written statement that after diligent search no record or entry of a

specified tenor is found to exist in the records, designated by the statement, authenticated as

provided in subsection (a)(1) of this rule in the case of a domestic record, or complying with the

requirements of subsection (a)(2) of this rule for a summary in the case of a foreign record, is

admissible as evidence that the records contain no such record or entry.

(c) Other Proof. This rule does not prevent the proof of official records or of entry or lack

of entry therein by any other method authorized by law.