Are Messenger Messages Admissible as Evidence in the Philippines?

Q: Did the Supreme Court really rule that Messenger messages obtained by private individuals are admissible?

Yes, on the facts of Cadajas y Cabias v. People, G.R. No. 247348 (16 November 2021). The Court held that the Bill of Rights is not invoked against acts of private individuals and that the constitutional admissibility rule affects only evidence obtained by the State through its agents, noting that the accused had shared his Messenger password with the complainant. It is a genuine and citable holding, but confined to the constitutional objection — it does not validate every method of obtaining chats, and it does not apply to evidence gathered by police.

Last materially reviewed: September 6, 2026

Direct Answer

Yes. Private chat messages can be admitted under the Rules on Electronic Evidence, and the Supreme Court has confirmed that Facebook Messenger material obtained by a private individual is not excluded by the Bill of Rights. That is the controlling framework, but it has a hard limit: the ruling does not reach evidence gathered by state agents, and it does not cure a violation of Republic Act No. 4200. Start by identifying who obtained the messages and how.

Key Takeaways

In Cadajas y Cabias v. People, G.R. No. 247348 (16 November 2021), the Supreme Court held that the Bill of Rights “is not meant to be invoked against acts of private individuals.”
That removes the constitutional objection only. It does not remove the RA 4200 bar, the authentication burden, or criminal exposure for unauthorised access.
Chats are “ephemeral electronic communications” and are proved by a participant’s testimony, or other competent evidence if no participant is available.
Proving a message came from an account is not proving who typed it — attribution is the usual battleground.
Entering another person’s Messenger account without authority risks prosecution for illegal access under RA 10175.
The Data Privacy Act generally does not bite where an individual keeps chats about their own personal, family or household affairs.

Decision Snapshot

Who obtained the messages, and how	General rule	What changes the answer	Likely next step
You, as a participant	No constitutional or wiretapping bar; ordinary authentication applies	Whether you still hold the device and account	Export the thread; describe the capture in an affidavit
A private individual with lawful access	Cadajas covers this squarely	Whether that person will testify	Get their own affidavit, not a forwarded image
Someone who logged in without permission	Constitutional objection may fail, but RA 10175 illegal access is a live risk	Whether any authority to access existed	Take advice; find a lawful source of the same content
Police or another state agent, no warrant	Cadajas does not apply; the exclusionary rule binds the State	Whether a warrant or recognised exception existed	Expect a motion to suppress
A covert recording of a voice or video call	Different statute — RA 4200 may bar it outright	Whether all parties authorised the recording	Assess RA 4200 exposure before filing

Governing Law and Authorities

The Supreme Court on privately obtained Messenger evidence. In Christian Cadajas y Cabias v. People, G.R. No. 247348 (16 November 2021), the accused was convicted under Section 4(c)(2) of RA 10175 in relation to RA 9775 on the strength of Facebook Messenger conversations and images accessed by the complainant’s mother. The Court held that “the Bill of Rights embodied in the Constitution is not meant to be invoked against acts of private individuals,” and that “the rule governing the admissibility of an evidence under Article III of the Constitution must affect only those pieces of evidence obtained by the State through its agents.” It added that the accused’s privacy expectation was reduced because he had shared his Messenger password: “Having been given authority to access his Facebook Messenger account, petitioner’s reasonable expectation of privacy, in so far as AAA is concerned, had been limited.” The material was “properly authenticated when AAA identified them in open court,” and the Court treated the contrary suggestion in Zulueta v. Court of Appeals as “a mere obiter dictum” (G.R. No. 247348).

Read the limits carefully. Cadajas answers one question: whether the Constitution excludes evidence gathered by a private person. It does not hold that any method of obtaining chats is lawful, does not displace RA 4200, and does not touch evidence gathered by police, who remain bound by the warrant requirement. The shared-password point mattered on those facts and is not a general licence to open other people’s accounts.

Rules on Electronic Evidence (A.M. No. 01-7-01-SC). Rule 2, Section 1 classifies “text messages, chatroom sessions” and similar communications “the evidence of which is not recorded or retained” as ephemeral electronic communications, and Rule 11, Section 2 provides that these are proved by testimony of a party to the communication or a person with personal knowledge, and by other competent evidence if such witnesses are unavailable. Where the chat is recorded or embodied in an electronic document, the electronic-document rules apply: Rule 5, Section 1 puts the burden of proving authenticity on the offering party, and Rule 7 governs weight (A.M. No. 01-7-01-SC).

RA 4200 and RA 10175. RA 4200, Section 4 makes any communication obtained in violation of that Act inadmissible in any judicial, quasi-judicial, legislative or administrative proceeding (RA 4200). RA 10175, Section 4(a)(1) criminalises “the access to the whole or any part of a computer system without right” (RA 10175).

What Must Be Established

A competent witness. Under Rule 11, Section 2 the ordinary route is a participant who can testify to the exchange; in Cadajas the material was authenticated when the complainant identified it in open court. If no participant is available, you fall back on “other competent evidence,” which is a materially harder position.

Authenticity and integrity. Rule 5, Section 1 places the burden on you, and Section 2(c) allows any evidence showing integrity and reliability to the satisfaction of the judge — in practice the device, the account, an unedited export and corroborating records. Rule 7 then asks how the record was generated, stored and communicated, how the originator was identified, and whether the system operated properly. A native export scores well on all of these; a photograph of someone else’s screen scores badly on all of them.

Attribution. This is the distinctive problem with chat evidence. Showing a message came from an account does not show who composed it: accounts are shared, phones are left unlocked, profiles are impersonated. Plan corroboration in advance — admissions made elsewhere, knowledge of facts only that person had, payments from a matching account, or activity records.

How the Messages Were Obtained

Where Cadajas helps. A private complainant who reads, saves or exports a conversation they had lawful access to is not defeated by a constitutional privacy objection. That is its practical significance for ordinary disputes: harassment, scams, unpaid debts, workplace complaints.

Where it does not. If police obtained the chats without a warrant, Cadajas is not on point and the exclusionary rule applies as usual. If a person entered an account they had no right to enter, the constitutional objection may fail while RA 10175, Section 4(a)(1) exposes them to prosecution for illegal access.

The voice-call boundary. RA 4200, Section 1 makes it unlawful for any person “not being authorized by all the parties to any private communication or spoken word” to use any device to secretly overhear, intercept or record it. In Ramirez v. Court of Appeals, G.R. No. 93833 (28 September 1995), the Court held that even a participant violates the Act: “even a (person) privy to a communication who records his private conversation with another without the knowledge of the latter (will) qualify as a violator” (G.R. No. 93833). The practical line: saving or exporting a written chat you are part of is not an interception, but secretly recording a Messenger voice or video call is a different act with a different statute attached — see recording someone without consent.

Data privacy. The National Privacy Commission’s published text of RA 10173 excludes from the definition of a personal information controller “an individual who collects, holds, processes or uses personal information in connection with the individual’s personal, family or household affairs” (RA 10173, Section 3(h)). Keeping a chat record for your own dispute generally falls inside that exclusion; posting the conversation publicly is a separate act — see online libel and posting someone’s photo without permission.

Philippine Scenarios (Hypothetical)

These are illustrative hypotheticals, not real cases or predictions of outcome.

Hypothetical 1 — the parent who checked a child’s phone. A parent opens a minor’s Messenger and finds messages from an adult. The parent is a private individual, so under Cadajas the Bill of Rights is not the obstacle. What remains is who testifies — the minor as participant, the parent as the person who preserved the thread, or both — and whether the export is complete and the account can be tied to the adult.

Hypothetical 2 — the denied account. A borrower sued on Messenger admissions testifies that a former partner knew his password and often replied for him. The chats are admitted, but the case turns on attribution, and the lender’s position improves only with independent corroboration such as transfers from the borrower’s own account.

Evidence and Documentation

For chat evidence the ranking differs from a general screenshot case, because the platform holds a far better record than you do.

Item	Why it matters	Strength
Platform response to a records request	Subscriber information and, with a warrant, content held by the provider	Strongest; reached through law enforcement and the courts, not private demand
Account data download or chat export	The whole thread in sequence, with structured timestamps and account identifiers	Very strong; the most valuable thing a private party can produce
The device and logged-in account	Lets the thread be displayed live and shows nothing was deleted	Strong; keep the handset and do not reinstall the app
Profile URL and numeric account identifier	Survives display-name changes	Strong on attribution; record it before the profile is edited
Hash values and corroborating third-party records	SHA-256 taken at preservation; transfers, delivery logs, other witnesses	Strong; corroboration is usually what decides an attribution dispute
Screenshots of the thread	Readable and easy to attach, but produced entirely by you	Moderate as an exhibit, weak as your only proof
A forwarded screenshot from someone else	You cannot testify to a capture you did not make	Weakest; usually unauthenticable without the capturer

The mechanics of turning a capture into an exhibit — annexes, affidavits, printing and formal offer — are covered in our companion guide, are screenshots admissible as evidence in the Philippines. This page deals with the messages themselves and how they were obtained. For general preservation practice see electronic evidence preservation.

Procedure and Next Steps

Do not delete, block or leave the conversation. Leaving a group chat or blocking an account can cut off your access to the thread. Preserve first, block afterwards.
Request your account data download. Use the platform’s own data-download tool while the thread exists, and save the export unedited.
Record the account identifiers. Save the profile URL and numeric identifier, not just the display name, which can be changed at any time.
Preserve the device and copy safely. Keep the phone, do not reinstall or clear the app, and copy exported files to two locations by cable rather than re-sending them through chat. Compute a SHA-256 value for each file and write a short preservation log: who preserved what, from which account, and when.
Check how it was obtained before relying on it. Were you a participant? Did you have authority to access the account? Is any part of it a covert recording of a call? Resolve this before filing, not at the hearing.
Put it into an affidavit. Rule 9, Section 1 allows an affidavit of direct personal knowledge to establish the matters bearing on admissibility and weight; Rule 9, Section 2 requires the affiant to affirm it in open court and be cross-examined as of right. If a third party preserved the thread, that person — not you — must execute the affidavit.
File in the right forum. Criminal complaints go by complaint-affidavit with annexes to the Office of the City or Provincial Prosecutor (National Prosecution Service) with jurisdiction, for preliminary investigation; RA 10175, Section 21 gives the Regional Trial Court jurisdiction over violations of that Act. You may first report to the PNP Anti-Cybercrime Group or the NBI Cybercrime Division — see our online scam complaint procedure. Civil money claims are filed with the appropriate court with all evidence attached.
Raise preservation with investigators immediately. RA 10175, Section 13 requires service providers to preserve traffic data and subscriber information for at least six months, and content data for six months from receipt of a preservation order, with a one-time six-month extension available to law enforcement. Section 14 provides that law enforcement, upon securing a court warrant, may require disclosure within 72 hours. Only law enforcement can trigger this, and the clocks run.

Remedies and Realistic Outcomes

Admissibility is a threshold, not an outcome. Cadajas tells you the Constitution will not keep privately obtained Messenger evidence out; it does not tell you the court will accept your reading of the conversation. Rule 7 still governs weight, and chat evidence usually loses on one of two fronts: completeness, where only a fragment is offered, and attribution, where the account is proved but the author is not.

Admitted and decisive — a complete export plus independent corroboration of who was writing.
Admitted but discounted — a partial thread, a disputed account, or nothing beyond your own captures.
Excluded for want of a witness — no participant available and no other competent evidence, so Rule 11, Section 2 cannot be satisfied.
Excluded, with exposure — a covert call recording caught by RA 4200, Section 4, or content from an account entered without right.
Settled early — a clean, complete export often ends the dispute before a court rules on anything.

Common Mistakes

Treating Cadajas as permission to open someone else’s account. It addresses admissibility against private actors, not the lawfulness of access.
Blocking or leaving the chat before exporting, and losing the thread.
Offering a handful of screenshots when a full export was available.
Relying on a display name instead of the profile identifier, which survives renaming.
Assuming that proving the account proves the author.
Secretly recording a Messenger voice or video call and assuming the same rules apply as to written chats.
Waiting until the platform record has aged past the RA 10175, Section 13 preservation periods.

Chat-Export and Preservation Checklist

Before you touch anything.

Conversation not deleted, archived away or left; the other account not blocked yet
Device kept, app not reinstalled or cache-cleared, account access retained

Export and record.

Platform data download or chat export requested and saved unedited, covering messages before and after the key exchange
Profile URL and numeric account identifier recorded, not just the display name
Files copied to two locations by cable or upload, never re-sent through a chat app
SHA-256 recorded for each exported file; preservation log written

Lawfulness and attribution.

Confirmed you were a participant, or had authority to access the account
No covert recording of a voice or video call is being offered
If a third party preserved the thread, that person will execute an affidavit and be cross-examined
Independent corroboration identified to link the account to a person: transfers, admissions, activity records, other witnesses

Recording distinction: Saved chat messages and a covert recording of a private Messenger call are not the same. The latter may require analysis under the RA 4200 Anti-Wiretapping Act.

Frequently Asked Questions

Did the Supreme Court really rule that Messenger messages obtained by private individuals are admissible?

Yes, on the facts of Cadajas y Cabias v. People, G.R. No. 247348 (16 November 2021). The Court held that the Bill of Rights is not invoked against acts of private individuals and that the constitutional admissibility rule affects only evidence obtained by the State through its agents, noting that the accused had shared his Messenger password with the complainant. It is a genuine and citable holding, but confined to the constitutional objection — it does not validate every method of obtaining chats, and it does not apply to evidence gathered by police.

Can I use messages a relative found on someone else’s phone?

Possibly, but two separate questions arise. The constitutional objection is unlikely to succeed, because that person is a private individual. The harder issues are whether entering the account or device was authorised, which bears on RA 10175 exposure, and whether that person will execute an affidavit and appear for cross-examination — you cannot authenticate a capture you did not make. Get advice before filing if the access was doubtful.

Does RA 4200 make chat screenshots inadmissible?

RA 4200 targets tapping and the use of devices to secretly overhear, intercept or record a private communication or spoken word, and Section 4 bars anything so obtained. Saving or exporting a written conversation you are a party to is not an interception of that kind. Secretly recording a Messenger voice or video call is a different matter, and Ramirez v. Court of Appeals confirms that even a participant can violate the Act by recording without the other party’s authorisation.

What if the other person says the account was hacked?

That is an attribution defence, and the most common one in chat cases. The messages can still be admitted, since admissibility and weight are decided separately, but you will need more than the thread itself: payments made from that person’s own account, knowledge of facts only they had, admissions made elsewhere, or login and activity records that only law enforcement can obtain from the platform.

Are Screenshots Admissible as Evidence in the Philippines? — the general rule and how to prepare and submit a capture
Electronic Evidence in the Philippines
Electronic Evidence Preservation
Recording Someone Without Consent
Online Scam Complaint Procedure
Online Libel in the Philippines
Posting Someone’s Photo Without Permission

Official Sources

More Messaging Evidence Guides

Disclaimer

Important:

Continue through the electronic-evidence workflow

Admissibility is only one part of the analysis. Use these guides to preserve the source, prove authenticity and prepare the record:

This article provides general educational information about Philippine law, regulation, cybersecurity, technology, or business compliance. It is not legal advice and does not create an attorney-client relationship. Laws, agency procedures, technical standards, platform rules, and the facts of each situation may change the result. Verify current requirements through the cited official sources and seek qualified professional advice when your rights, deadlines, money, safety, or legal exposure may be affected.

Cybercode.ph

Verify and Get Assistance