The rule on forum shopping applies only to judicial cases or proceedings and not to administrative cases, and the Office of the Ombudsman has concurrent jurisdiction with the sangguniang panlungsod over administrative cases against elective barangay officials, such that a party who participates in Ombudsman proceedings without objection is estopped from impugning its jurisdiction after an adverse ruling.

Petitioner Manuel D. Laxina, Sr. was the Barangay Chairman of Brgy. Batasan Hills, Quezon City, having been elected to a third term. Evangeline Ursal served as Barangay Clerk of the same barangay. The Office of the Ombudsman, created under the 1987 Constitution and operationalized through R.A. No. 6770 (the Ombudsman Act of 1989), exercises disciplinary authority over elective and appointive officials, while the Local Government Code (R.A. No. 7160) grants the sangguniang panlungsod disciplinary authority over elective barangay officials, establishing concurrent jurisdiction between the two bodies.

Petitioner Manuel D. Laxina, Sr. was the Barangay Chairman of Brgy. Batasan Hills, Quezon City. On December 15, 1998, Evangeline Ursal, the Barangay Clerk of the same barangay, filed a complaint with the National Bureau of Investigation charging petitioner with attempted rape. Petitioner was subsequently charged with sexual harassment before the Regional Trial Court of Quezon City.

On March 13, 2000, Ursal filed a complaint-affidavit with the Department of the Interior and Local Government charging petitioner with grave misconduct for the alleged attempted rape. The DILG referred the complaint to the Quezon City Council for appropriate action, where it was docketed as Adm. Case No. 00-13. Thereafter, on March 30, 2000, Ursal filed a similar complaint-affidavit with the Office of the Ombudsman, docketed as OMB-ADM Case No. 0-00-0350. Petitioner filed his counter-affidavit with supporting affidavits of two witnesses but did not disclose the pending case before the City Council.

On August 15, 2000, the Administrative Adjudication Bureau of the Office of the Ombudsman initially exonerated petitioner, dismissing the complaint for lack of substantial evidence. However, upon review and with the approval of the Ombudsman, petitioner was found guilty of grave misconduct on July 2, 2001, and meted the penalty of dismissal with forfeiture of material benefits. Petitioner sought reconsideration, alleging lack of jurisdiction on the part of the Ombudsman for the first time, but the motion was denied on August 1, 2001. Meanwhile, Ursal asked the City Council to waive its jurisdiction in favor of the Ombudsman, but the City Council merely noted the motion.

On August 20, 2001, the AAB issued an order directing Quezon City Mayor Feliciano R. Belmonte, Jr. to implement the July 2, 2001 Memorandum Order and to submit a compliance report. Mayor Belmonte issued an implementing order notifying petitioner of his dismissal from service and enjoining him to cease and desist from performing his duties as barangay captain. Petitioner had received a copy of the Memorandum Order on July 23, 2001, and filed his motion for reconsideration on July 27, 2001, within the five-day reglementary period under the Ombudsman Act. After receiving the denial of his motion on August 21, 2001, petitioner filed his petition with the Court of Appeals on August 31, 2001, within the ten-day appeal period. By the time the matter reached the Supreme Court, petitioner had already stepped down and a new barangay chairman had been sworn into office.

• Forum Shopping and Jurisdiction: Petitioner argued that the Office of the Ombudsman did not have jurisdiction over the administrative complaint because the Quezon City Council had earlier acquired jurisdiction over the matter, invoking the rule that when two or more bodies have concurrent jurisdiction, the first to validly acquire jurisdiction takes it to the exclusion of the others. He maintained that Ursal's filing of identical complaints before both the City Council and the Ombudsman constituted forum shopping warranting dismissal of both cases.
• Estoppel: Petitioner claimed that estoppel cannot apply to him because he never invoked the jurisdiction of the Ombudsman or sought affirmative relief therefrom, and he had no obligation to disclose the existence of another identical case since he was not the one who instituted the identical cases.
• Premature Implementation: Petitioner asserted that Administrative Order No. 7, as amended by Administrative Order No. 14-A of the Office of the Ombudsman, decreeing that all administrative orders and decisions are immediately executory notwithstanding the perfection of an appeal, is contrary to the mandate of R.A. No. 6770. Citing Lapid vs. Court of Appeals, he argued that an appeal timely filed stays the immediate implementation of a decision.
• Due Process and Substantial Evidence: Petitioner maintained that he was deprived of administrative due process when the Ombudsman refused to consider his evidence and rendered a decision not supported by substantial evidence. He characterized the Ombudsman's findings as "speculations, surmises, probabilities, half-truths and other unfounded/unsupported hearsay evidence," invoked the principles employed in rape prosecutions, and pointed to his reelection to a third term as testament to his innocence.

• Jurisdiction and Constitutional Mandate: The Office of the Ombudsman, through the Office of the Solicitor General, argued that the City Council's assumption of jurisdiction would not deprive the Ombudsman of its constitutional mandate to act on complaints against public officials and protect the citizenry from illegal acts of government officials.
• Estoppel: Even assuming forum shopping existed, petitioner is estopped from questioning the technical defect, having participated in the proceedings without raising any objection until after an adverse decision.
• Liberality of Administrative Proceedings: The OSG emphasized that technical rules of procedure and evidence are not strictly applied in administrative proceedings and should be applied with liberality.
• Mootness of Injunctive Relief: Mayor Belmonte noted that the injunctive reliefs sought were improper because he had already issued an implementing order dismissing petitioner, and another person had already been sworn into office as Barangay Chairman.

• Forum Shopping: Whether the rule on forum shopping applies to administrative proceedings before the Office of the Ombudsman.
• Jurisdiction: Whether the Office of the Ombudsman has jurisdiction over the administrative complaint against an elective barangay official, given the prior filing before the Quezon City Council.
• Estoppel: Whether petitioner is estopped from questioning the Ombudsman's jurisdiction having participated in the proceedings without objection.
• Due Process and Substantial Evidence: Whether petitioner was denied administrative due process and whether the Ombudsman's decision was supported by substantial evidence.
• Premature Implementation: Whether the Ombudsman prematurely ordered implementation of its dismissal order before it became final and executory, and whether injunctive relief is still available.

• Forum Shopping: No. The rule on forum shopping applies only to judicial cases or proceedings and not to administrative cases, as the relevant Supreme Court circulars refer only to initiatory pleadings in courts of law.
• Jurisdiction: Yes. The Office of the Ombudsman has concurrent jurisdiction with the Quezon City Council over administrative cases against elective barangay officials, pursuant to the Constitution, R.A. No. 6770, and R.A. No. 7160.
• Estoppel: Yes. Petitioner is estopped from questioning the Ombudsman's jurisdiction, having participated in the proceedings by filing his counter-affidavit without disclosing the pending case before the City Council and raising the jurisdictional issue only after an adverse decision.
• Due Process and Substantial Evidence: No. Petitioner was accorded the opportunity to be heard and to present evidence, and the Ombudsman's decision is supported by substantial evidence as defined in administrative law — a standard different from proof beyond reasonable doubt in criminal proceedings.
• Premature Implementation: Yes, but injunctive relief is unavailable. The Ombudsman improperly ordered implementation before the Memorandum Order attained finality, as an appeal timely filed stays the immediate implementation of the decision under Lapid vs. Court of Appeals. However, the implementation was already fait accompli, rendering injunctive relief moot.

• Forum Shopping: The rule on forum shopping, as embodied in Supreme Court Administrative Circulars Nos. 04-94 and 28-91 and in Section 5, Rule 7 of the 1997 Rules of Civil Procedure, applies only to initiatory pleadings in courts of law — original civil complaints, counterclaims, cross-claims, third-party complaints, petitions, or applications wherein a party asserts a claim for relief. The complaint-affidavits filed by Ursal before the City Council and the Ombudsman merely contained a recital of the alleged culpable acts of petitioner and did not assert any claim for relief or pray for any penalty. Moreover, petitioner cited no rule or circular on forum shopping issued by the Office of the Ombudsman or the City Council; it was only on September 15, 2003, that the Ombudsman, through Administrative Order No. 17, required a Certificate of Non-Forum Shopping in complaints against public officials.

• Jurisdiction: The Ombudsman's mandate to investigate complaints against erring public officials is derived from both the Constitution (Section 12, Article XI) and R.A. No. 6770 (Section 16), giving it jurisdiction over complaints on all kinds of malfeasance, misfeasance, and non-feasance against government officers and employees, including disciplinary authority over all elective and appointive officials except those removable only by impeachment or members of Congress and the Judiciary. Under R.A. No. 7160 (Section 60), the sangguniang panlungsod has disciplinary authority over elective barangay officials. These provisions establish concurrent jurisdiction. The Ombudsman was unaware of the pending case before the City Council when it took cognizance of the complaint, as neither the complaint-affidavit nor the counter-affidavit mentioned it, and it was duty-bound to act on all complaints against government officials.

• Estoppel: Estoppel by laches is the failure or neglect for an unreasonable and unexplained length of time to do what, by exercising due diligence, ought to have been done earlier, warranting a presumption that the party entitled to assert a right has either abandoned it or acquiesced to the correctness and fairness of its resolution. Petitioner participated in the Ombudsman proceedings by filing his counter-affidavit with supporting evidence, failed to inform the Ombudsman of the other administrative complaint of which he was presumably aware, and raised the issue of jurisdiction only after the Ombudsman rendered an adverse decision. Participation in administrative proceedings without raising any objection bars a party from later impugning jurisdictional infirmity after an adverse decision.

• Due Process and Substantial Evidence: Petitioner was required to answer the formal charge and given the chance to present evidence, satisfying the requirements of administrative due process. The standard of proof in administrative cases is substantial evidence — such relevant evidence as a reasonable mind might accept as adequate to support a conclusion — which is different from proof beyond reasonable doubt required in criminal proceedings. Petitioner's reliance on the rules governing rape prosecutions was misplaced because the issue before the Ombudsman was whether his acts constituted grave misconduct, not whether he was guilty of attempted rape. The Ombudsman did pass upon petitioner's evidence but found it bereft of credibility, while Ursal's allegations were found more credible, corroborated by medical findings, NBI reports, and surrounding circumstances.

• Premature Implementation: Under Section 27 of R.A. No. 6770, a motion for reconsideration may be filed within five days after receipt of written notice, and decisions may be appealed to the Supreme Court by filing a petition for certiorari within ten days from receipt of the decision or denial of the motion for reconsideration. Petitioner received the Memorandum Order on July 23, 2001, filed his motion for reconsideration on July 27, 2001, received the denial on August 21, 2001, and filed his petition with the CA on August 31, 2001 — all within reglementary periods. Pursuant to Lapid vs. Court of Appeals, decisions of the Ombudsman imposing penalties not enumerated in Section 27 are not final, unappealable, and immediately executory; an appeal timely filed stays the immediate implementation of the decision. However, because petitioner had already stepped down and a new barangay chairman had been sworn in, the implementation was fait accompli, and injunction would not lie as the acts sought to be enjoined had already been accomplished.

• Forum Shopping Limited to Judicial Proceedings — The rule on forum shopping applies only to judicial cases or proceedings and not to administrative cases. Supreme Court Administrative Circulars Nos. 04-94 and 28-91 refer only to initiatory pleadings in courts of law wherein a party asserts a claim for relief. Complaint-affidavits in administrative proceedings that merely recite alleged culpable acts without asserting a claim for relief or praying for a penalty do not fall within the scope of the forum-shopping rule.

• Concurrent Jurisdiction of the Ombudsman and Local Sanggunian — The Office of the Ombudsman, under the Constitution and R.A. No. 6770, has concurrent jurisdiction with the sangguniang panlungsod (under R.A. No. 7160) over administrative cases against elective barangay officials. The Ombudsman's constitutional mandate to act on complaints against public officials is not divested by the prior assumption of jurisdiction by a local sanggunian.

• Estoppel by Laches in Administrative Proceedings — A party who participates in administrative proceedings without raising any objection to the body's jurisdiction is barred from raising jurisdictional infirmity after an adverse decision is rendered. Estoppel by laches is based on public policy requiring the discouragement of stale claims and is principally an issue of inequity or unfairness, not merely a question of time.

• Substantial Evidence Standard in Administrative Cases — A finding of guilt in an administrative case is sustained as long as it is supported by substantial evidence — such relevant evidence as a reasonable mind might accept as adequate to support a conclusion. This standard is different from proof beyond reasonable doubt required in criminal proceedings, and reliance on criminal law standards in administrative proceedings is misplaced.

• Stay of Execution Pending Appeal in Ombudsman Decisions — Under Section 27 of R.A. No. 6770, as construed in Lapid vs. Court of Appeals, decisions of the Ombudsman imposing penalties not enumerated in Section 27 (i.e., penalties other than public censure, reprimand, or suspension of not more than one month's salary) are not final, unappealable, and immediately executory. An appeal timely filed stays the immediate implementation of the decision; otherwise, the essential nature of these judgments as appealable would be rendered nugatory.