Authentication of Private Writings

Nature of the Requirement

A private writing is not received as an authentic act of its alleged maker merely because it is relevant, marked, or attached to a pleading. If it is offered as genuine, Rule 132 requires proof of its due execution and authenticity before it may be admitted for that purpose.

Authentication is the evidentiary foundation that connects the writing to the person, act, or transaction it purports to represent. It is distinct from relevance, from the original document rule, from the hearsay rule, and from the substantive validity of the transaction embodied in the writing.

A document may be authentic but still inadmissible because its contents are hearsay, because the original should have been produced, because it is irrelevant, or because a substantive rule makes it ineffective. Conversely, a document may be relevant but still excluded as an authentic private writing if its execution or genuineness is not shown.

Private Writings Distinguished

A private writing is a writing that is not a public document and does not carry the evidentiary self-authentication attached to public instruments. It commonly includes private contracts, receipts, letters, notes, private acknowledgments, ledgers, memoranda, promissory notes, and other writings made by private persons without official certification or proper notarization.

What Must Be Proved

Due execution means that the writing was made, signed, adopted, or otherwise executed by the person to whom it is attributed, or by one authorized to act for that person when authority is material. Authenticity means that the writing is genuine and is not a spurious, substituted, or materially altered document.

The proponent need not prove the whole case at the authentication stage. The required showing is a prima facie foundation sufficient to permit the court to receive the writing as what the proponent claims it to be. The opposing party may still attack the document's weight, genuineness, authority, voluntariness, delivery, consideration, or legal effect through contrary evidence.

Authentication does not establish the truth of every statement written in the document. If the writing contains assertions offered for their truth, the hearsay rule must still be satisfied. If the writing is offered because the making of the statement itself has legal significance, as in notice, demand, acceptance, waiver, or admission, the principal concern is proof that the writing was made, sent, received, or adopted by the relevant person.

Modes of Authentication

Rule 132 recognizes two direct modes of proving a private document offered as authentic: testimony of a person who saw the document executed or written, and evidence of the genuineness of the signature or handwriting of the maker.

Witness Who Saw the Execution or Writing

The most direct authentication is testimony from a person with personal knowledge that the alleged maker signed, wrote, executed, or adopted the document. The witness may be a party, a subscribing witness, a counterparty, an employee who observed the signing, a person present during the preparation, or any competent witness who actually saw the relevant act.

The witness need not be the person who prepared the document. What matters is personal knowledge of the act of execution or writing, and the ability to identify the document presented in court as the same document, or as a reliable counterpart, connected to that act.

When the writing is signed for a juridical entity or through an agent, authentication may require proof not only of the physical signature but also of the capacity or authority in which the signatory acted, if the document is offered to bind the principal or entity.

Proof of Signature or Handwriting

A private writing may also be authenticated by showing that the signature or handwriting is genuine. This may be done through a witness familiar with the person's handwriting, through comparison with writings admitted or satisfactorily proved to be genuine, or through expert testimony where the nature of the dispute makes technical comparison useful.

A witness may be familiar with handwriting because the witness saw the person write, regularly received writings from that person, acted upon writings purporting to be from that person, or had dealings that supplied a reliable basis for recognition. Familiarity acquired solely for purposes of litigation is weaker than familiarity acquired in ordinary dealings, although the court ultimately weighs the basis of the testimony.

The court may compare the disputed writing with genuine standards. The standard used for comparison should itself be admitted, treated as genuine by the adverse party, or proved to the court's satisfaction. A handwriting expert is not indispensable, because the trier of fact may consider ordinary appearance, admitted exemplars, circumstances of custody, and the testimony of persons familiar with the handwriting.

Proof of handwriting authenticates the writing only to the extent that the handwriting is material. If the document is typewritten, printed, stamped, electronically generated, or signed by mark, the proponent should connect the document to the alleged maker through the signature, adoption, custody, transmission, surrounding dealings, or other competent proof recognized by the applicable rules.

Identification Without Full Authentication

Rule 132 also provides that any other private document need only be identified as that which it is claimed to be. This applies when the document is not offered as the genuine act, declaration, or contract of the alleged maker, but merely as a physical item or circumstance in the case.

Thus, a witness may identify a paper as the document found in a drawer, received in an envelope, attached to an email, included in a file, or shown to a party. If the proponent later relies on the paper as authored, signed, or executed by a specific person, the foundation must rise to authentication of the private writing.

Identification answers the question, "Is this the item connected to the witness's testimony?" Authentication answers the further question, "Is this genuinely the writing or execution of the person to whom it is attributed?" The required foundation depends on the purpose for which the evidence is offered.

When Separate Proof Is Unnecessary

Separate proof of authenticity may be unnecessary when the adverse party admits the genuineness and due execution of the writing. The admission may arise from express testimony, stipulation, pre-trial admission, response to a request for admission, or failure to make a proper sworn denial of an actionable document in the pleadings when the rules require such denial.

In civil actions based on a written instrument pleaded as the foundation of a claim or defense, an insufficient denial may result in an implied admission of genuineness and due execution. The admission generally covers the fact that the document was signed or executed as it purports to have been, that the signatures are genuine, and that apparent formalities of execution are not disputed. It does not automatically admit the truth of every recital, the correctness of legal conclusions, or defenses not inconsistent with execution, such as payment, extinguishment, illegality, fraud, mistake, or want of consideration when properly pleaded and proved.

Authentication is also dispensed with for an ancient private document when the requisites under the rule are present: the document is more than thirty years old, is produced from a custody in which it would naturally be found if genuine, and is unblemished by alterations or circumstances of suspicion. The age, custody, and unsuspicious condition substitute for ordinary proof because direct witnesses are no longer expected to be available.

A notarized instrument, when notarization is regular, is treated as a public document and enjoys a presumption of regularity in its execution. If the notarization is void, defective, or successfully impeached, the document may lose that public character and must be treated as a private writing requiring authentication.

Alterations, Copies, and Related Foundations

A private writing that appears altered, intercalated, erased, overwritten, mutilated, or suspicious on its face requires explanation when the alteration is material. Authentication must relate to the document in the condition in which it is offered, because a signature on an earlier unaltered instrument does not necessarily authenticate a changed instrument.

If the contents of a private writing are the subject of inquiry, the original document rule must also be considered. Authentication of a photocopy or duplicate is not enough when the original is required and no exception applies. If secondary evidence is allowed, the proponent must still show both the admissibility of secondary evidence and the authenticity of the underlying private writing.

For electronic private writings, authentication requires proof that the electronic record is what the proponent claims it to be. The foundation may come from the author, sender, recipient, custodian, system administrator, metadata, digital signature, access credentials, business process, or other competent evidence showing integrity, authorship, receipt, or adoption. The same basic principle remains: the writing must be connected to its alleged source before it is used as that source's act or statement.

Effect of Authentication

Once authenticated and admitted, the private writing becomes competent documentary evidence for the purpose stated in the offer, subject to all other rules on admissibility and weight. The court may consider the document together with testimony, admissions, conduct, surrounding circumstances, and objections affecting credibility or probative value.

Authentication is not conclusive. The adverse party may prove forgery, simulation, unauthorized signing, lack of corporate authority, material alteration, mistake, fraud, duress, non-delivery, payment, novation, rescission, or any other defense relevant to the document's evidentiary or substantive effect.

A timely objection should be made when an unauthenticated private writing is offered as authentic. Marking during trial, attachment to a pleading, inclusion in a bundle, or identification for inventory purposes does not by itself make the writing admissible as the genuine act of the alleged maker. If the defect is not seasonably raised, the objection may be deemed waived, but the document's weight may still be affected by the weakness of its foundation.

Functional Summary