P.R. Laws Ap. tit. 32A, § IV, Rule 79
Extrinsic evidence of authenticity as a condition precedent to admissibility is not required with respect to the following:
(A) Acknowledged documents. — Documents accompanied by a certificate of acknowledgment or proof, if the certificate complies with the pertinent statutory provisions concerning certificates, particularly with the provisions on notarial law.
(B) Public documents under official seal. — Documents bearing a seal purporting to be the official seaL of:
(1) The Commonwealth of Puerto Rico; or
(2) the United States of America; or
(3) a state, territory or possession of the United States of America; or
(4) a department, public agency, public corporation or public officer of any of the entities enumerated in clauses (1), (2) and (3) above.
Said documents must bear the signature of the person purporting to attest to or execute them.
(C) Public documents bearing official signatures. — Documents which, although having no seal, purport to bear the signature in his official capacity of an officer of any of the entities included in clauses (1), (2) and (3) of subsection (B) of this rule, if a competent officer certifies under seal that the signature is genuine and that the signer has the official capacity to sign the documents.
(D) Foreign public documents. — A document purporting to be signed in his official capacity by an officer or deputy of an officer of a nation recognized by the executive power of the United States and the document bearing the signature is accompanied by certification, issued by a competent consular officer, certifying that the document is valid and existent in the foreign nation.
(E) Certified copies of public records and documents. — A copy of an official record, or part thereof, or of a document authorized by law or public regulation to be filed in a public office, if certified as correct by the custodian or other person authorized by law to make the certification, if the certificate meets the requirements set forth in subsections (B), (C) or (D) of this rule, or in any other pertinent law or public regulation.
(F) Official publications. — Books, pamphlets or other publications purporting to be issued by public authority.
(G) Newspapers and periodicals. — Printed materials purporting to be newspapers or periodicals.
(H) Trade inscriptions. — Inscriptions, signs, tags and the like, purporting to have been affixed in the course of business and indicating ownership, control and origin.