How Is Forgery Proven Under Article 169?
Introduction
Forgery allegations involving checks, drafts, promissory notes, and other negotiable instruments often determine whether a transaction is enforceable and whether criminal liability may arise. The Revised Penal Code, however, does not treat a mere denial of a signature or an irregular-looking document as proof of forgery.
Forgery must be established by competent and convincing evidence. The evidence must connect the questioned writing, signature, figure, letter, word, or sign to one of the acts described in Article 169 of the Revised Penal Code and, where criminal liability is charged, must ultimately satisfy the standard of proof beyond reasonable doubt.
What Does Article 169 Define as Forgery?
Article 169 of the Revised Penal Code defines how the forgery covered by the preceding provisions may be committed. It identifies two principal methods:
- giving a treasury or bank note, or an instrument payable to bearer or to order, the appearance of a genuine document; or
- erasing, substituting, counterfeiting, or altering the figures, letters, words, or signs contained in the instrument.
These acts are stated in [The Revised Penal Code, Article 169 (1930)](#L1.175). The provision is located in the chapter concerning forged treasury or bank notes, obligations, and securities. It should not be read as a general definition covering every commercial document.
Does Article 169 Apply to Every Commercial Document?
No. Article 169 specifically concerns the manner of forging instruments identified in the relevant provisions on treasury or bank notes, obligations, and securities payable to bearer or to order.
Falsification involving public, official, commercial, or private documents may instead fall under other provisions of the Revised Penal Code, depending on the character of the document, the identity of the offender, and the manner by which the falsification was committed. Article 171, for example, addresses falsification by a public officer, employee, notary, or ecclesiastical minister who takes advantage of an official position, as stated in [The Revised Penal Code, Article 171 (1930)](#L1.177).
Accordingly, a pleading or legal analysis should identify the precise statutory offense. Calling a document “forged” does not, by itself, establish that Article 169 is the applicable provision.
What Must Be Proven to Establish Forgery?
Forgery cannot be presumed. The party alleging forgery bears the burden of proving it through clear, positive, and convincing evidence in civil proceedings. This rule was reiterated in “Philippine Trust Company v. Gabinete, et al.”, G.R. No. 216120, 2017, and “Lim v. Equitable PCI Bank”, G.R. No. 183918, 2014.
The evidence must ordinarily establish the following matters:
- the existence and identity of the questioned instrument;
- the specific signature, writing, figure, word, or sign alleged to be false or altered;
- the genuine specimen or standard against which the questioned feature may be compared;
- the falsifying act, such as imitation, counterfeiting, alteration, erasure, or substitution; and
- the connection of the accused or opposing party to the alleged forgery, where liability or invalidity is being asserted against that person.
In a criminal case, the prosecution must prove the elements of the charged offense beyond reasonable doubt. Clear and convincing evidence is not a substitute for the criminal standard; it describes the quality commonly required to overcome an allegation of forgery in civil litigation and related proceedings.
Why Is Comparison with a Genuine Signature Important?
The fact of forgery is ordinarily established by comparing the alleged forged signature with an authentic and genuine signature of the person whose signature is questioned. The comparison must be based on reliable specimens rather than conjecture or a bare denial.
In “Yabut, et al. v. Nachbaur”, G.R. No. 243470, 2021, the Supreme Court explained that forgery may be proven through a comparison of the questioned signatures with genuine signatures and accepted categorical testimony from the persons whose signatures were allegedly falsified. The Court also reiterated that handwriting-expert testimony is not indispensable.
Similarly, “Equitable CardNetwork, Inc. v. Capistrano”, G.R. No. 180157, 2012, recognizes that a court may compare questioned signatures with admitted specimens and determine clear variance even without expert testimony.
Is a Handwriting Expert Required?
No. Philippine jurisprudence does not make expert handwriting testimony an absolute requirement. A court may evaluate the questioned signature against admitted genuine signatures and consider the testimony of the purported signatory and other surrounding evidence.
Expert testimony may nevertheless be useful when the signatures are substantially similar, the available specimens are limited, or the alleged alteration involves technical features that are difficult to assess without specialized knowledge. Its absence does not automatically defeat a forgery claim, while its presence does not automatically establish one.
The court remains responsible for assessing the totality of the evidence. An expert opinion is weighed with the other proof and may be rejected if it is based on inadequate specimens, photocopies, unsupported assumptions, or an unreliable methodology.
Are Photocopies Sufficient to Prove Forgery?
As a general rule, a photocopy is inadequate when the issue requires examination of the original signature or alteration. In “People of the Philippines v. Camenforte, et al.”, G.R. No. 220916, 2021, the Supreme Court stated that the best evidence of a forged signature is the original instrument containing the questioned signature.
The Court further explained that a comparison based only on a xerox copy or reproduction may not produce reliable results. The original is especially important because it permits examination of the writing, ink, pressure, line quality, erasures, interlineations, superimpositions, and other physical characteristics.
A secondary copy may be considered only when the applicable rules of evidence permit secondary evidence and the proponent first establishes the original’s unavailability for a reason not attributable to the proponent’s fault. Even then, the copy must still provide a legally sufficient basis for proving the alleged forgery.
How Do Notarization and Regularity Affect the Evidence?
A notarized document generally enjoys a presumption of regularity and due execution. The presumption is not conclusive, but the party challenging the instrument must overcome it with strong, complete, and convincing evidence.
In “Philippine Trust Company v. Gabinete, et al.”, G.R. No. 216120, 2017, the Supreme Court held that the presumption attached to notarized documents cannot be defeated by a mere handwriting opinion when other evidence, including the notary’s testimony that the document was signed in the notary’s presence, supports due execution.
“Cogtong v. Kyoritsu International, Inc., et al.”, G.R. No. 160729, 2007, likewise recognizes that notarized deeds of real estate mortgage and promissory notes carry a presumption of authenticity and due execution. The party alleging forgery must present sufficient proof to overcome that presumption.
What Evidence May Support a Forgery Claim?
The following evidence may be relevant, depending on the facts:
| Evidence | Possible significance |
|---|---|
| Original questioned instrument | Permits direct examination of the signature, writing, ink, erasures, and alterations. |
| Admitted genuine signatures | Provides a reliable basis for comparison. |
| Testimony of the purported signatory | May establish that the person did not sign or execute the instrument. |
| Notary’s testimony and notarial records | May support or contradict the claimed execution and acknowledgment. |
| Transaction records and surrounding circumstances | May show possession, delivery, authority, participation, or suspicious circumstances. |
No single item is automatically decisive. The court must determine whether the evidence forms a coherent and reliable basis for finding that the document was falsified and that the legally responsible person committed or used the falsification.
Can Circumstantial Evidence Prove Forgery?
Yes. Circumstantial evidence may establish forgery when the circumstances form an unbroken chain leading to moral certainty of guilt in a criminal case. Suspicion, inconsistency, or unusual circumstances standing alone are insufficient.
For example, evidence that a person had exclusive access to the instrument, possessed the means to alter it, presented it as genuine, and benefited from the transaction may be relevant. Those circumstances must still be proven and must exclude reasonable explanations consistent with innocence.
What Happens When the Original Document Is Missing?
The absence of the original may seriously weaken a forgery allegation because the court cannot directly compare the questioned signature or inspect the physical characteristics of the instrument. “People of the Philippines v. Camenforte, et al.”, G.R. No. 220916, 2021, emphasizes that a definitive comparison ordinarily requires the original document.
The party relying on secondary evidence must first account for the original and establish the basis for admitting a copy under the rules of evidence. If the copy is admitted, the court must still assess whether it is sufficiently reliable to prove the alleged falsification.
What Is the Effect of a Prior Civil Judgment?
A final and executory civil judgment conclusively determining the genuineness of signatures may affect a later criminal prosecution based on the same alleged falsification. In “People of the Philippines v. Camenforte, et al.”, G.R. No. 220916, 2021, the Supreme Court recognized that such a determination may constitute a prejudicial question when it is substantively connected to, and determinative of, the criminal case.
The effect depends on the identity of the factual issue, the finality and executory character of the civil judgment, and its determinative relation to the criminal charge. The doctrine is not based solely on which case was filed first.
Typical Examples
Altered check. A claim that the amount or payee of a check was changed should be supported by the original check, banking records, testimony concerning its issuance, and competent proof of the alteration. A photocopy and a general denial may be insufficient.
Imitated signature on a promissory note. The alleged signatory should identify genuine signature specimens and explain the circumstances showing non-execution. The opposing party may rely on the original note, witnesses to signing, notarial records, and evidence of delivery or receipt.
Spurious authority to execute a mortgage. A forged special power of attorney may affect the validity of a mortgage, but the issue requires proof of the alleged owner’s genuine signature and the circumstances surrounding the transaction. Suspicious circumstances may also affect the claimed good faith of the mortgagee, as illustrated in “Yabut, et al. v. Nachbaur”, G.R. No. 243470, 2021.
Recommended Litigation Steps
- Obtain and preserve the original document whenever possible.
- Identify the exact feature alleged to be falsified: signature, amount, date, payee, wording, or other entry.
- Collect multiple admitted genuine specimens created near the relevant period.
- Secure testimony from the purported signatory, witnesses, custodian, notary, bank, or document examiner as appropriate.
- Challenge or establish the admissibility of secondary evidence before relying on photocopies.
- Address the presumption of regularity attached to notarized documents.
- Prove the accused’s or opposing party’s participation, knowledge, use, or benefit, not merely the document’s alleged falsity.
Conclusion
Article 169 of the Revised Penal Code identifies forgery as the act of making an instrument appear genuine or of erasing, substituting, counterfeiting, or altering its figures, letters, words, or signs. It is not enough to assert that a commercial instrument “looks false.” The allegation must be tied to a specific statutory act and supported by reliable evidence.
The strongest proof ordinarily consists of the original instrument, genuine comparison specimens, testimony from the purported signatory or relevant witnesses, and corroborating transaction records. Expert testimony can assist but is not mandatory. Photocopies, bare denials, and unsupported suspicions generally cannot replace competent proof, particularly where the document is notarized or the charge is criminal.
Before filing or defending a case, counsel should determine whether Article 169 or another falsification provision applies, preserve the original document, assess the available comparison specimens, and distinguish evidence proving the document’s falsity from evidence connecting a particular person to the alleged forgery.
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