PLDT vs. Tiamson

An employer must prove just cause for termination by substantial evidence; unauthenticated documentary exhibits and uncorroborated, self‑serving affidavits, standing alone, lack the probative weight required to sustain a dismissal, and their insufficiency renders the dismissal illegal. Affidavits may be admitted in labor proceedings but, being self‑serving, they must be accompanied by other relevant corroborating evidence to constitute substantial proof. Documents that are not authenticated—such as computer printouts bearing only handwritten, unsigned annotations—carry no probative value even under the liberal rules of administrative procedure.

Antonio Q. Tiamson was a regular Radio Technician II at PLDT’s North Luzon Toll Network Division, Clark Transmission Maintenance Center (Clark‑TMC) in Pampanga. In July 1994, Anthony Dy Dee, president of a local telephone company, complained about a fraudulent overseas call scam originating from Clark‑TMC, allegedly involving PLDT personnel in collusion with subscribers. PLDT dispatched inspectors and investigators to conduct surveillance. On August 2, 1994, radio technician Vidal Busa was caught in flagrante delicto monitoring an illegally connected overseas call. The investigation expanded to other employees, including Tiamson, after Busa named him as a participant.

Nature of the Charge and Investigation: On July 29, 1994, PLDT received a complaint from a local telephone system president about fraudulent overseas calls originating from its Clark‑TMC facility. A surveillance team was dispatched. Vidal Busa, a radio technician, was apprehended in the act on August 2, 1994. PLDT’s Quality Control and Inspection Department obtained a CAMA tape printout of all long‑distance calls from the Clark exchange for July 29 to August 2, 1994; it disclosed 469 fraudulent connections, three of which occurred on August 1, 1994 during the tour of duty that PLDT attributed to Tiamson (10:00 p.m. to 6:00 a.m.).

Busa’s Statements: In his initial sworn statement on August 2, 1994, Busa named Arnel Cayanan (Shift Supervisor), Antonio Tiamson, and Paul Cruzada as co‑participants. He claimed he would see the circuit engaged whenever he relieved them. During a confrontation on August 3, 1994, Busa reiterated that he had seen Tiamson making illegal connections and that Tiamson would return the line to normal position before leaving. Busa also stated that the four of them alone knew the illegal operation.

Tiamson’s Defense: Tiamson admitted knowing how to make overseas calls using company equipment but denied actually doing so. He claimed he disconnected Busa’s illegal calls when he was on duty and did not report Busa for fear of antagonizing a supervisor. Tiamson maintained that his shift on August 1, 1994 was from 6:00 a.m. to 10:00 p.m., not the night shift during which the three calls were made.

The Notice and Termination: PLDT issued a memorandum dated August 12, 1994 charging Tiamson with serious misconduct. The charge sheet stated: Busa implicated him; Tiamson admitted knowledge of how to initiate an overseas call using the Lenkurt 26600 Signalling Test Set; and he failed to report the anomaly. The memorandum made no reference to the three Saudi‑Arabia‑bound calls of August 1, 1994 captured on the CAMA tape. Tiamson submitted a written explanation denying participation. PLDT found the explanation unsatisfactory and terminated his employment by memorandum dated October 5, 1994, effective October 7, 1994, on grounds of serious misconduct and/or fraud.

Conflicting Shift‑Schedule Evidence: The appellate court noted that Busa’s shift (1:00 p.m. to 6:00 a.m.) preceded Tiamson’s regular shift (6:00 a.m. to 2:00 p.m.), making Busa’s claim—that he relieved Tiamson and found the circuit engaged—implausible. PLDT countered with logbook entries showing rotation of shifts and argued Busa sometimes took over from Tiamson.

• Substantial Evidence of Just Cause: PLDT argued that Busa’s sworn statements specifically implicating Tiamson, Cayanan’s corroborating statement, and the CAMA tape printout showing three fraudulent calls during Tiamson’s duty collectively constituted more than substantial evidence of serious misconduct.
• Credibility of Busa: PLDT maintained that the CA erred in discrediting Busa because Tiamson failed to show any improper motive on Busa’s part; Busa’s accusation was consistent from the outset. The shift‑schedule discrepancy was explained by rotation reflected in the logbook, which PLDT attached to its appeal memorandum.
• Procedural Due Process: PLDT contended that Tiamson was accorded full due process—he received a notice of the charge and was given an opportunity to explain, followed by a termination notice. The company insisted that the Labor Code requires only a statement of the causes for termination; the CAMA tape printout was a mere evidentiary detail that need not be recited in the charge.
• Admissibility of Evidence: PLDT invoked the liberal evidentiary rules in labor proceedings, arguing that affidavits are admissible even without cross‑examination of the affiant.

• Hearsay and Lack of Corroboration: Tiamson countered that Busa’s affidavit was uncorroborated hearsay because Busa was never presented for cross‑examination. He asserted that Busa could not have witnessed the acts described because Busa’s shift came before his own.
• Unreliability of the CAMA Printout: Tiamson argued that the printout was unauthenticated, contained handwritten, unsigned annotations, and was not identified by a competent witness; it could not serve as corroborative proof.
• Denial of Due Process: Tiamson pointed out that the specific charge regarding the three overseas calls of August 1, 1994, which the NLRC relied upon, was never mentioned in the August 12, 1994 memorandum; he was denied the opportunity to refute it.

• Substantial Evidence: Whether PLDT adduced substantial evidence to prove that Tiamson committed serious misconduct warranting dismissal, considering the self‑serving nature of Busa’s uncorroborated affidavit and the unauthenticated CAMA tape printout.
• Procedural Due Process: Whether Tiamson was denied procedural due process when the notice of the charge omitted the particular accusation—the three overseas calls of August 1, 1994—that the NLRC later used as a basis for finding just cause. (Not reached.)

• Substantial Evidence: No substantial evidence of just cause was presented. Busa’s affidavits, although admissible in administrative proceedings, were self‑serving and by themselves did not constitute “relevant evidence which a reasonable mind may accept as adequate.” The affidavits required corroboration. The CAMA tape printout failed to supply that corroboration because it was unauthenticated: the annotations were handwritten and unsigned, and no proper company officer authenticated it. Relying on Asuncion v. NLRC and Uichico v. NLRC, the printout was held inadmissible and devoid of probative value even under the relaxed rules of procedure before labor tribunals. Because the employer’s evidence did not meet the threshold of substantial evidence, the dismissal was illegal.
• Procedural Due Process: In light of the dispositive finding that no just cause existed, there was no need to rule on whether procedural due process was observed.

• Burden of Proof in Termination Cases — The employer bears the burden of proving that the dismissal was for a just and valid cause; the employer’s case must stand on the strength of its own evidence, not on the weakness of the employee’s defense. Failure to discharge this burden renders the dismissal illegal.
• Substantial Evidence Standard — The quantum of proof required in dismissal cases is substantial evidence—more than a mere scintilla, such relevant evidence as a reasonable mind might accept as adequate to support a conclusion, even if equally reasonable minds might opine otherwise.
• Self‑Serving Affidavits — Affidavits, though admissible in labor proceedings, are self‑serving and must be received with caution. Generalized and pro‑forma affidavits, standing alone, do not constitute substantial evidence; they require corroboration from other relevant evidence.
• Authentication of Documentary Evidence — The liberal procedural rules applicable to administrative agencies do not dispense with the requirement of authenticity as a condition for admissibility. Documents that are unauthenticated—such as unsigned, handwritten listings or computer printouts bearing solely handwritten annotations—carry no rational probative value and must be rejected as mere self‑serving evidence.

• “It is a settled rule that factual findings of labor officials, who are deemed to have acquired expertise in matters within their respective jurisdictions, are generally accorded not only respect but even finality. However, where there is divergence in the findings and conclusions of the NLRC, on the one hand, from those of the Labor Arbiter and the Court of Appeals, on the other, the Court is constrained to examine the evidence.” — Stating the exception that allowed factual review.
• “In termination cases, the burden of proof rests upon the employer to show that the dismissal is for just and valid cause; failure to do so would necessarily mean that the dismissal was illegal. The employer’s case succeeds or fails on the strength of its evidence and not on the weakness of the employee’s defense.” — Core allocation of the evidentiary burden.
• “Although admissible in evidence, affidavits being self‑serving must be received with caution. … By themselves, generalized and pro‑forma affidavits cannot constitute relevant evidence which a reasonable mind may accept as adequate. There must be some other relevant evidence to corroborate such affidavits.” — Explaining why Busa’s statements were insufficient.
• “It is true that administrative and quasi‑judicial bodies like the NLRC are not bound by the technical rules of procedure in the adjudication of cases. However, this procedural rule should not be construed as a license to disregard certain fundamental evidentiary rules. While the rules of evidence prevailing in the courts of law or equity are not controlling in proceedings before the NLRC, the evidence presented before it must at least have a modicum of admissibility for it to be given some probative value.” — Quoting Uichico v. NLRC, underscoring the limits of liberality.

• Asuncion v. National Labor Relations Commission, 362 SCRA 56 (2001) — Followed. The Court applied its holding that unsigned handwritten listings and unauthenticated computer printouts are unreliable and without probative value even in administrative proceedings.
• Uichico v. National Labor Relations Commission, 273 SCRA 35 (1997) — Followed. Used to reinforce the principle that while procedure is liberal, fundamental evidentiary rules requiring a minimum of authenticity and reliability are not discarded.
• Solidbank Corporation v. Court of Appeals, 409 SCRA 554 (2003) — Cited as authority that the employer bears the burden of proving just cause for dismissal.
• Mendoza v. National Labor Relations Commission, 310 SCRA 846 (1999) — Cited for the rule that affidavits are self‑serving and must be received with caution, and that generalized affidavits alone are insufficient.

• Article 282 [now Article 297] of the Labor Code — The provision enumerating just causes for termination (serious misconduct, fraud, etc.). The employer’s evidence was measured against the requirement that such cause be proven by substantial evidence.
• Omnibus Rules Implementing the Labor Code (procedural due process requirements) — The “twin‑notice” rule was discussed by the CA, though not resolved by the Supreme Court. The first notice must apprise the employee of the particular acts or omissions for which dismissal is sought; the second communicates the employer’s decision.

Associate Justice Reynato S. Puno (Chairman, Acting Chief Justice), Associate Justice Ma. Alicia Austria‑Martinez, Associate Justice Dante O. Tinga. (Associate Justice Minita V. Chico‑Nazario was on leave.)