Unproven Claims Authenticating Private Documents IN Construction Disputes

The Supreme Court's 2019 ruling in Young Builders Corporation v. Benson Industries, Inc. (G.R. No. 198998) is a cautionary tale for contractors and businesses pursuing collection claims. The case shows that a claim based on unauthenticated private documents—even if attached to a complaint—cannot stand in court. For construction firms and litigants, the decision clarifies when documents must be formally authenticated and why a "self-serving" billing statement is not enough to prove a claim worth millions.

The Dispute

Young Builders Corporation (YBC) sued Benson Industries, Inc. (BII) for unpaid construction work on an eight-storey commercial building in Cebu City. YBC claimed it was owed over P24 million for the main contract and extra works, based on an Accomplishment Billing dated May 18, 1998. BII denied liability, arguing that YBC delayed and abandoned the project and that the claimed "extra works" were actually remedial works.

The Regional Trial Court ruled in favor of YBC. The Court of Appeals reversed, dismissing the complaint because YBC failed to authenticate its private documents. The Supreme Court affirmed the CA's ruling.

The Key Issue: What Is an "Actionable Document"?

YBC argued that its Accomplishment Billing was an "actionable document" attached to the complaint. Under Rule 8 of the Rules of Court, when an action is based on a written instrument, the document must be attached to the pleading, and the genuineness and due execution of such a document are deemed admitted unless the adverse party specifically denies them under oath.

The Supreme Court clarified that not every attached document qualifies as "actionable." A document is actionable only when the specific right or obligation that is the basis of the action emanates from it. In this case, the Accomplishment Billing was merely evidence of YBC's claim—it was not the source of the parties' rights and obligations. The actual construction contract, which would have been the actionable document, was never presented.

Because the Accomplishment Billing was merely evidentiary, BII was not required to deny its genuineness under oath. A simple denial was sufficient.

The Authentication Requirement

Even if the Accomplishment Billing had been properly denied, YBC still failed to authenticate it. Under the Rules of Court on proof of private documents, a private document must be proved before it is admitted as authentic. This can be done by:

• Anyone who saw the document executed or written; or
• Evidence of the genuineness of the signature or handwriting of the maker.

In this case, the person who signed the Accomplishment Billing—YBC's Chairman—never testified. YBC's witness merely identified the document; he did not testify that he saw it executed, nor did he affirm the genuineness of the signature. The Court, citing Chua v. Court of Appeals, held that without proof of authenticity, the document must be excluded.

The same rule applied to a letter from BII's representative that YBC claimed was an admission against interest. The letter was entered into evidence but never identified in open court, so it was inadmissible.

The Best Evidence Rule and Other Pitfalls

YBC also presented a photocopy of a certification from BII's president claiming the building was completed. The Supreme Court noted that under the Best Evidence Rule, a photocopy is secondary evidence. It is admissible only if the original is lost, destroyed, or unavailable without bad faith, or if the original is in the custody of the adverse party. YBC invoked none of these exceptions, so the photocopy was inadmissible.

Moreover, YBC's own witness admitted in court that the building was never completed, undermining the certification's significance.

The Burden of Proof

The Court emphasized that YBC, as the plaintiff, bore the burden of proving its claim by preponderance of evidence. A self-serving Accomplishment Billing, without supporting receipts, payrolls, or other credible evidence, was insufficient. The Court cited United Airlines, Inc. v. Court of Appeals: a plaintiff must rely on the strength of its own evidence, not the weakness of the defendant's.

Practical Takeaways

• Authenticate private documents before trial. If a claim relies on a billing statement, letter, or certification, ensure that a witness who can testify to its execution or the genuineness of the signature is presented.
• Know what is "actionable." Only documents that are the actual basis of the claim or defense require a sworn specific denial. Evidence that merely supports a claim does not.
• Keep originals. A photocopy of a private document is secondary evidence and will be excluded unless an exception to the Best Evidence Rule applies.
• Support billing claims with corroborating evidence. Receipts, payrolls, and other records can substantiate the amounts claimed. A self-serving document alone will not carry the case.
• Present the contract. In construction disputes, the written contract is the actionable document. Its absence can be fatal to a collection claim.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.