THE prosecution has arrived with paper by the box, but impeachment is not won by weight. Official folders can raise suspicion; they do not, by their own mass, prove guilt. The decisive question is narrower and harder: whether a competent witness can personally connect Vice President Sara Duterte to the acts charged, the order given, the money received, the intent formed, the concealment directed. Without that human link, the case is not merely thin. It has not crossed the line from accusation to proof.
Three failures now define the threshold fight. The burden cannot be shifted through compelled admissions. Custodians and analysts can authenticate records, but they cannot supply personal attribution. And documentary irregularity, however troubling, does not become personal culpability unless a witness actually perceived the act.
Section 22, Rule 130 of the 2019 Revised Rules on Evidence states the point plainly: A witness may testify only to facts known through personal perception, unless the Rules provide otherwise. The rule is not decorative. A witness can be tested for perception, memory, narration and sincerity only if the witness actually saw, heard, or sensed the fact being proved. Without the real source, cross-examination becomes performance, not protection.
That is where a paper-heavy case hits a hard wall. Official records and business entries may be admissible. A custodian may identify a document and state what it says. But no exception turns the custodian into a witness to what the respondent ordered, received, intended or concealed. Reading the file is not perceiving the act.
This is not a lawyer’s escape hatch. It is the burden of proof in operation. Impeachment may be sui generis, but it is not a license to remove a constitutional officer on allegation dressed as inference. Clear and convincing evidence requires more than probability, though less than proof beyond reasonable doubt. Competent evidence is how that standard is met. Personal knowledge is how testimony becomes competent.
The burden stays with the prosecution from the first witness to the last. It cannot be outsourced to the respondent. On Sept. 29, 2026, the impeachment court denied a prosecution request that the vice president admit 104 matters, including bank and financial records. Presiding officer Francis Escudero held that civil requests for admission cannot override the right against self-incrimination, and that the prosecution cannot shift its burden “through the simple expedient of a request for admission.” That was the right call. Requiring silence to become admission would not narrow the issues; it would make the accused help prove the case against herself.
The live testimony has exposed the same weakness. National Bureau of Investigation director Melvin Matibag was examined on alleged threats, but he assumed office only in February 2026. He was not part of the first investigation after the November 2024 press conference. Knowledge of a later task force is not knowledge of an earlier probe. Defense counsel called the gap what it was: testimony without perception. The same problem shadowed the idea of presenting former senator Antonio Trillanes IV on bank records. A witness who did not make, receive, or handle the records cannot swear to their contents from personal knowledge. Dropping such a witness was not tactical charity. It was evidentiary reality.
The confidential-funds article is where the doctrine bites hardest. Audit disallowances, deficient receipts, civil-registry non-matches, and handwriting observations may show irregular liquidation. They do not, by themselves, prove that the vice president ordered a release, received money, or directed the preparation of papers. After more than 30 trial days, no witness has said from personal perception that she gave the order or took the money. Ramil Madriaga’s affidavits claim personal instruction. That is why his testimony matters, and why his credibility, custody and consistency may decide the article. Without a perceiving witness, a stack of documents remains an accusation looking for proof.
The unexplained wealth allegation meets the same limit. Asset, tax and bank comparisons may establish arithmetic. They do not automatically establish concealment. A gap between declared net worth and recorded balances is a fact to be tested and explained. It becomes betrayal of public trust only when ownership, non-declaration and intent are proved. An analyst can summarize tables. An analyst cannot testify to the state of mind the tables are asked to imply.
The complaint should have been tested by the same discipline from the start. A verification may swear only to facts within personal knowledge or must say plainly that it relies on authentic records. In Garrido, Jr. v. Gadon, the Supreme Court treated a verification that disguised hearsay as personal knowledge as professional misconduct. The House applied the same principle in 2017, when it junked an impeachment complaint against then-president Rodrigo Duterte because the accusations rested on what the complainant had read and been told. Majority Leader Rodolfo Fariñas put it simply: What you heard or read is hearsay, and it will not stand. That was not partisan maneuvering. It was rule-of-proof discipline.
Personal knowledge is not a technicality reserved for one respondent. It is the guardrail that keeps impeachment from becoming government by suspicion. It forces accusers to produce a witness who perceived the act, or a record that lawfully speaks for itself, and then to let that proof face cross-examination. The distinctions are not semantic: Disallowance is not theft, a balance is not concealment, and a briefing is not a fact. If personal culpability cannot be proved through competent evidence, the article must fail. In a republic governed by evidence, paper may start the inquiry. It cannot end a vice presidency.
