In the Philippine legal system, "public office is a public trust." Local Chief Executives (LCEs), specifically mayors, are held to high standards of conduct under the law. When a mayor fails to uphold these standards, citizens or aggrieved parties may initiate administrative proceedings to seek accountability.

I. Legal Basis and Grounds for Action

The primary law governing administrative cases against elective local officials is Republic Act No. 7160, otherwise known as the Local Government Code of 1991 (LGC).

Under Section 60 of the LGC, an elective local official may be disciplined, suspended, or removed from office on any of the following grounds:

Disloyalty to the Republic: Acts that undermine the sovereignty or integrity of the Philippines.
Culpable Violation of the Constitution: Deliberate and serious breach of constitutional provisions.
Dishonesty, Oppression, or Misconduct in Office: Actions involving fraud, cruelty, or wrongful behavior related to their official duties.
Gross Negligence or Dereliction of Duty: Flagrant disregard for mandatory obligations.
Offense Involving Moral Turpitude: Crimes that are inherently base or vile (e.g., estafa, bribery).
Abuse of Authority: Using the powers of the office for personal gain or to harass others.
Unauthorized Absence: Frequent absences without leave for more than three consecutive months.

II. Where to File: The Matter of Jurisdiction

The venue for filing an administrative complaint depends on the classification of the city or municipality where the mayor serves:

1. Office of the President (OP)

Complaints against Mayors of Highly Urbanized Cities (HUCs), Independent Component Cities, or Provinces are filed directly with the Office of the President.

2. Sangguniang Panlalawigan (Provincial Board)

Complaints against Mayors of Component Cities and Municipalities are filed before the Sangguniang Panlalawigan of the province to which the city or municipality belongs.

3. The Office of the Ombudsman

Under the Ombudsman Act of 1989 (R.A. 6770), the Ombudsman has concurrent jurisdiction. They can investigate any administrative act or omission of a public official that appears to be illegal, unjust, or improper, regardless of the official's rank or the LGC's specific venue rules.

III. The Administrative Procedure

The procedure is generally governed by the LGC and the internal rules of the investigating body (e.g., Administrative Order No. 23 for the Office of the President).

The Verified Complaint: The complaint must be in writing and under oath (verified). It must state the specific grounds and be accompanied by supporting affidavits and evidence.
Notice to Answer: Within seven (7) days of filing, the respondent Mayor is served a copy of the complaint and required to file a verified answer within fifteen (15) days.
Preliminary Investigation: The investigating authority determines if there is sufficient ground to proceed with a formal inquiry.
Formal Investigation: This stage involves the presentation of evidence and testimony. The investigation must be terminated within ninety (90) days from its commencement.
Decision: A decision must be rendered within thirty (30) days after the investigation is concluded.

IV. Preventive Suspension

During the investigation, a mayor may be placed under preventive suspension. This is not a penalty, but a measure to prevent the official from using their position to influence witnesses or tamper with evidence.

Who can impose it: The President (for HUC mayors) or the Governor (for component city/municipal mayors upon recommendation of the Sangguniang Panlalawigan).
Duration: No single preventive suspension shall exceed sixty (60) days. If multiple charges are filed, the total suspension cannot exceed ninety (90) days within a single year.
Requisites: There must be strong evidence of guilt, and the charge must involve dishonesty, oppression, misconduct, or neglect of duty.

V. Penalties and Removal

The investigating authority may impose the following penalties:

Censure
Reprimand
Suspension (not to exceed the unexpired term or six months per charge)
Removal from Office

Important Note: Under Section 60 of the LGC, the penalty of removal can only be executed by a final decision of a court of justice. While the Office of the President or the Sangguniang Panlalawigan can recommend removal, the Ombudsman has the unique statutory power to directly order the removal of an elective official.

VI. Appeals and the "Condonation Doctrine"

Appeals: Decisions of the Sangguniang Panlalawigan are appealable to the Office of the President. Decisions of the Office of the President are appealable to the Court of Appeals via a Petition for Review.
The Condonation Doctrine (Expired): Historically, the "Aguinaldo Doctrine" suggested that a re-elected official could no longer be punished for administrative offenses committed during a previous term. The Supreme Court has abandoned this doctrine. Re-election no longer acts as a "legal wipeout" for administrative liability in the Philippines.