A Legal Article in the Philippine Context

I. Introduction

In Philippine remedial law, a party aggrieved by an adverse ruling of a lower court must be careful in choosing the correct remedy and the correct forum. This is especially important when the decision or order comes from a Municipal Trial Court in Cities, commonly called the MTCC.

A frequent question is:

Where should a petition for certiorari against an MTCC decision be filed?

The answer depends on the nature of the remedy being pursued. As a general rule, ordinary errors of judgment by an MTCC are corrected by appeal to the Regional Trial Court, not by certiorari. However, if the MTCC acted without jurisdiction, in excess of jurisdiction, or with grave abuse of discretion amounting to lack or excess of jurisdiction, and there is no appeal or any plain, speedy, and adequate remedy in the ordinary course of law, the proper remedy may be a petition for certiorari under Rule 65.

As to forum, a petition for certiorari against an MTCC is generally filed with the Regional Trial Court exercising supervisory jurisdiction over the MTCC, subject to the hierarchy of courts, venue, and procedural rules. In exceptional cases, higher courts may have concurrent jurisdiction, but direct resort to higher courts is generally discouraged unless justified by compelling reasons.

II. The MTCC in the Philippine Judicial System

The Municipal Trial Court in Cities is a first-level court. It is part of the lower court system and generally has jurisdiction over certain civil, criminal, ejectment, small claims, traffic, ordinance, and other cases assigned to first-level courts by law.

First-level courts include:

Municipal Trial Courts;
Municipal Circuit Trial Courts;
Metropolitan Trial Courts;
Municipal Trial Courts in Cities.

An MTCC is therefore a trial court of limited jurisdiction. Its decisions and orders are generally subject to review by the Regional Trial Court, depending on the nature of the case and the remedy available.

III. Appeal Versus Certiorari

Before asking where to file, one must first ask whether certiorari is the correct remedy at all.

A. Appeal

An appeal is the usual remedy when a party claims that the MTCC committed an error of judgment. This means the court may have had jurisdiction over the case, but allegedly made the wrong factual or legal conclusion.

Examples of errors ordinarily correctible by appeal include:

Wrong appreciation of evidence;
Wrong interpretation of a contract;
Incorrect computation of damages;
Erroneous finding of liability;
Misapplication of law while acting within jurisdiction;
Incorrect ruling after trial;
Adverse judgment in an ejectment case;
Adverse judgment in an ordinary civil case within MTCC jurisdiction.

In such cases, the remedy is usually appeal to the Regional Trial Court, not certiorari.

B. Certiorari

A petition for certiorari under Rule 65 is an extraordinary remedy. It is not a substitute for a lost appeal. It is available only when the tribunal, board, or officer exercising judicial or quasi-judicial functions acted:

Without jurisdiction;
In excess of jurisdiction; or
With grave abuse of discretion amounting to lack or excess of jurisdiction;

and there is no appeal or any plain, speedy, and adequate remedy in the ordinary course of law.

Thus, certiorari is concerned not with every legal mistake, but with jurisdictional error or grave abuse of discretion.

IV. What Is Grave Abuse of Discretion?

Grave abuse of discretion means more than simple error. It refers to a capricious, whimsical, arbitrary, or despotic exercise of judgment equivalent to lack of jurisdiction.

A mere disagreement with the MTCC’s ruling does not automatically justify certiorari. The error must be so serious that the court effectively acted outside the bounds of its authority.

Examples that may raise certiorari issues include:

Acting despite clear lack of jurisdiction;
Denying due process;
Issuing an order contrary to an express rule in a manner amounting to arbitrariness;
Refusing to perform a ministerial duty;
Proceeding against a party without valid service or notice;
Taking cognizance of a case clearly beyond MTCC jurisdiction;
Enforcing an order issued in patent disregard of procedural rights;
Acting in a manner that leaves the aggrieved party without appeal or adequate remedy.

By contrast, the following usually involve errors of judgment correctible by appeal:

The MTCC believed one witness over another;
The MTCC interpreted the facts differently;
The MTCC awarded damages allegedly too high or too low;
The MTCC dismissed a claim after evaluating evidence;
The MTCC ruled against a party on the merits.

V. General Rule: File the Petition for Certiorari with the Regional Trial Court

A petition for certiorari questioning an MTCC ruling is generally filed with the Regional Trial Court that has territorial and supervisory jurisdiction over the MTCC.

This is because the RTC has appellate and supervisory authority over first-level courts within its territorial jurisdiction. The MTCC is a lower court, and the RTC is the usual reviewing court for decisions and certain orders of first-level courts.

Thus, if the MTCC is located in a particular city, the petition for certiorari should generally be filed in the RTC of the same territorial jurisdiction, usually the RTC branch or office authorized to receive such petitions in that judicial region or station.

Example

If the questioned decision or order was issued by the MTCC of Cebu City, the petition for certiorari would generally be filed with the Regional Trial Court having jurisdiction over Cebu City, subject to local docketing and raffle rules.

If the questioned ruling came from the MTCC of Davao City, the petition would generally be filed with the Regional Trial Court having jurisdiction over Davao City.

VI. Why Not File Directly with the Court of Appeals?

The Court of Appeals may have original jurisdiction over petitions for certiorari in appropriate cases. However, courts follow the doctrine of hierarchy of courts.

Under this doctrine, even if higher courts have concurrent jurisdiction, a party must generally file first with the lowest court competent to act on the matter. For an MTCC ruling, that court is ordinarily the Regional Trial Court.

Direct filing with the Court of Appeals may be dismissed for violation of the hierarchy of courts unless special and compelling reasons justify bypassing the RTC.

Examples of possible exceptional circumstances may include:

Issues of transcendental importance;
Urgent constitutional issues;
Matters requiring immediate higher court intervention;
Situations where the RTC remedy is clearly inadequate;
Questions involving broad public interest;
Circumstances showing that direct resort is necessary to prevent serious injustice.

Even then, direct resort to the Court of Appeals must be justified clearly in the petition.

VII. Why Not File Directly with the Supreme Court?

Direct filing with the Supreme Court is even more exceptional. The Supreme Court is not generally the first forum for challenging an MTCC decision through certiorari.

Although the Supreme Court has constitutional authority over petitions for certiorari in proper cases, it strictly enforces the hierarchy of courts. A petition filed directly with the Supreme Court against an MTCC decision will ordinarily be vulnerable to dismissal unless extraordinary circumstances exist.

The proper path is usually:

MTCC → RTC

not:

MTCC → Supreme Court

and generally not:

MTCC → Court of Appeals

unless exceptional circumstances justify direct resort.

VIII. Certiorari Is Not a Substitute for Appeal

One of the most important doctrines in this area is that certiorari cannot be used as a substitute for a lost, improper, or neglected appeal.

If a party received an adverse MTCC decision and simply failed to appeal within the proper period, the party usually cannot revive the case by filing a Rule 65 petition for certiorari.

The reason is that certiorari is extraordinary. It is not designed to correct every mistake. It exists to correct jurisdictional errors and grave abuse of discretion where there is no adequate remedy by appeal.

Therefore, if appeal was available and adequate, a petition for certiorari may be dismissed.

IX. When Appeal Is the Correct Remedy from an MTCC Decision

In many MTCC cases, the remedy from an adverse judgment is appeal to the RTC.

This is common in:

Ordinary civil cases;
Ejectment cases;
Criminal cases within MTCC jurisdiction;
Traffic or ordinance cases, depending on procedure;
Cases where the MTCC rendered judgment after trial;
Other first-level court decisions where appeal is provided by the Rules of Court.

In such cases, the notice of appeal is generally filed with the MTCC that rendered the judgment, and the case is elevated to the RTC.

The RTC then reviews the appealed case. The RTC may affirm, reverse, modify, or remand, depending on the applicable rules.

X. When Certiorari May Be Proper Against an MTCC Decision or Order

Certiorari may be considered when the MTCC acted in a way that cannot be adequately corrected by appeal.

Examples include:

1. Lack of Jurisdiction

The MTCC hears a case that belongs exclusively to another court or tribunal.

Example: The MTCC assumes jurisdiction over a civil action whose subject matter clearly exceeds its jurisdictional limit, and no adequate remedy exists under the circumstances.

2. Excess of Jurisdiction

The MTCC has jurisdiction over the case but acts beyond what the law allows.

Example: The MTCC issues relief beyond its authority or continues proceedings despite loss of jurisdiction.

3. Grave Abuse of Discretion

The MTCC acts arbitrarily, capriciously, or in patent disregard of due process.

Example: The MTCC renders an order against a party without notice or meaningful opportunity to be heard, in a manner amounting to denial of due process.

4. No Plain, Speedy, and Adequate Remedy

Even if appeal technically exists, certiorari may be considered if appeal is not plain, speedy, or adequate under the circumstances.

However, this requirement is strictly applied. The petitioner must explain why ordinary appeal is inadequate.

XI. Rule 65 Petition for Certiorari: Essential Requisites

A petition for certiorari must generally show:

The respondent court or judge exercised judicial or quasi-judicial functions;
The respondent acted without jurisdiction, in excess of jurisdiction, or with grave abuse of discretion amounting to lack or excess of jurisdiction;
There is no appeal or any plain, speedy, and adequate remedy in the ordinary course of law;
The petition was filed within the reglementary period;
The petition complies with procedural requirements;
The material facts are alleged with specificity;
Certified true copies and relevant documents are attached;
The petition includes proper verification and certification against forum shopping.

Failure to satisfy these requirements can result in outright dismissal.

XII. Period to File a Petition for Certiorari

A Rule 65 petition for certiorari must generally be filed within 60 days from notice of the judgment, order, or resolution being assailed.

If a timely motion for reconsideration or motion for new trial is required and filed, the 60-day period is generally counted from notice of the denial of that motion.

The period is strict. Late filing may result in dismissal.

XIII. Is a Motion for Reconsideration Required Before Certiorari?

As a general rule, a party must first file a motion for reconsideration before filing a petition for certiorari. This gives the MTCC an opportunity to correct its alleged error.

A petition for certiorari may be dismissed if filed without a prior motion for reconsideration.

However, there are recognized exceptions. A prior motion for reconsideration may not be required when:

The order is a patent nullity;
The issue raised is purely legal;
Urgent necessity justifies immediate court action;
Further delay would prejudice substantial rights;
The motion would be useless;
The petitioner was deprived of due process;
The issue has already been passed upon;
Public interest is involved;
The proceedings are ex parte or the petitioner had no opportunity to seek reconsideration;
Other recognized exceptional circumstances exist.

Even when relying on an exception, the petition should clearly explain why a motion for reconsideration was unnecessary.

XIV. Proper Respondents in the Petition

In a petition for certiorari against an MTCC action, the respondents usually include:

The judge or court whose act is being challenged, as nominal public respondent; and
The adverse party in the MTCC case, as private respondent.

In practice, the petition title may name the judge in official capacity and the opposing litigant. The public respondent is generally not expected to participate as an advocate, while the private respondent defends the challenged ruling.

The exact caption and parties should comply with the Rules of Court and current practice.

XV. Venue and Territorial Jurisdiction

For a petition against an MTCC, filing with the proper RTC generally means filing with the RTC that has territorial jurisdiction over the place where the MTCC sits.

The petition is normally filed with the Office of the Clerk of Court of the proper RTC and assigned by raffle to a branch, unless special local rules apply.

A petition filed in the wrong court may be dismissed or transferred, but dismissal is a serious risk. The petitioner should identify the correct RTC station before filing.

XVI. Effect of Filing a Petition for Certiorari

The filing of a petition for certiorari does not automatically stay the execution or enforcement of the MTCC decision or order.

If the petitioner wants to stop implementation, the petitioner must usually ask for provisional relief, such as:

Temporary restraining order;
Writ of preliminary injunction;
Status quo order;
Other appropriate injunctive relief.

The petitioner must show legal grounds for such relief. Without a restraining order or injunction, the challenged proceedings or execution may continue.

This is especially important in ejectment cases, where execution rules may move quickly.

XVII. Certiorari in Ejectment Cases Decided by the MTCC

Many MTCC decisions involve ejectment, such as unlawful detainer or forcible entry.

The usual remedy from an MTCC ejectment judgment is appeal to the RTC. The losing party must comply with the requirements for appeal, including timely filing and, where applicable, payment or deposit requirements relating to rentals or reasonable compensation.

A Rule 65 petition for certiorari is not the ordinary remedy to challenge the merits of an ejectment decision. It may be available only where the MTCC acted without jurisdiction, in excess of jurisdiction, or with grave abuse of discretion, and appeal is not adequate.

A party who uses certiorari to avoid appeal requirements in ejectment cases risks dismissal.

XVIII. Certiorari in Small Claims Cases

Small claims cases follow special rules. Judgments in small claims cases are generally final, executory, and unappealable. Because appeal is unavailable, a party sometimes considers certiorari.

However, certiorari in small claims cases remains limited. It is not a broad appeal. It may be available only for jurisdictional errors, grave abuse of discretion, or denial of due process.

For an MTCC small claims judgment, the petition for certiorari is generally filed with the proper Regional Trial Court, subject to the same principles of hierarchy and supervisory jurisdiction.

The petitioner must still show that the MTCC acted with grave abuse of discretion or without/excess of jurisdiction. Mere dissatisfaction with the result is insufficient.

XIX. Certiorari in Criminal Cases from the MTCC

In criminal cases within the jurisdiction of the MTCC, ordinary remedies depend on the stage and nature of the ruling.

A judgment of conviction or acquittal has specific rules. An accused may generally appeal a conviction, while the prosecution’s ability to challenge an acquittal is limited by the constitutional protection against double jeopardy.

Certiorari may be available in criminal matters only in exceptional situations, such as:

Lack or excess of jurisdiction;
Grave abuse of discretion;
Denial of due process;
Void proceedings;
Orders not otherwise appealable and causing substantial prejudice.

However, certiorari cannot be used to violate the accused’s right against double jeopardy. A petition by the prosecution questioning an acquittal must be assessed with extreme caution.

XX. Certiorari Against Interlocutory Orders of the MTCC

An interlocutory order is an order that does not finally dispose of the case. Examples include orders denying motions to dismiss, discovery rulings, procedural orders, or orders admitting evidence.

As a general rule, interlocutory orders are not immediately appealable. The remedy is usually to proceed with trial and raise the issue on appeal after judgment.

However, certiorari may be available if the interlocutory order was issued with grave abuse of discretion or without jurisdiction, and waiting for appeal would not be adequate.

For example, if the MTCC refuses to dismiss a case despite an obvious lack of jurisdiction, or proceeds in a manner that violates due process, certiorari may be considered.

Again, the usual forum is the proper RTC.

XXI. Certiorari Against Execution Orders

If the MTCC issues a writ of execution or an order of execution allegedly without authority, certiorari may be considered.

Examples include:

Execution issued before judgment became final and executory, without legal basis;
Execution issued despite a perfected appeal;
Execution enforcing a void judgment;
Execution beyond the terms of the judgment;
Execution against a person or property not legally subject to execution.

The petition is generally filed with the RTC exercising supervisory jurisdiction over the MTCC, and injunctive relief may be necessary to prevent enforcement while the petition is pending.

XXII. Required Attachments

A Rule 65 petition should usually attach certified true copies or clearly legible duplicate originals of material documents, such as:

The assailed MTCC decision, order, or resolution;
The motion for reconsideration, if any;
The order denying reconsideration;
Relevant pleadings filed before the MTCC;
Relevant evidence or transcripts, if necessary;
Proof of service;
Verification;
Certification against forum shopping;
Secretary’s certificate or authority, if petitioner is a juridical entity;
Explanation for substituted service, if applicable;
Other documents necessary to show grave abuse of discretion.

Incomplete attachments may lead to dismissal.

XXIII. Verification and Certification Against Forum Shopping

The petition must generally be verified. The petitioner must attest that the allegations are true and correct based on personal knowledge or authentic records.

The petition must also contain a certification against forum shopping, stating that the petitioner has not commenced another action involving the same issues in any court, tribunal, or agency, and that if the petitioner learns of such action, the court will be informed.

Failure to comply with verification and certification requirements can be fatal.

XXIV. Service and Filing

The petitioner must serve copies of the petition on the adverse party and the public respondent as required by the Rules of Court.

Filing and service may involve:

Personal filing;
Registered mail;
Accredited courier;
Electronic filing, where applicable;
Other modes allowed by current procedural rules and court issuances.

Proof of service must be attached. If service is not personal, a written explanation may be required depending on applicable rules.

XXV. Court Fees

The petitioner must pay the required docket and other lawful fees upon filing. Non-payment or insufficient payment may affect the court’s acquisition of jurisdiction over the petition.

In urgent cases, counsel must ensure that the petition, injunctive application, and fees are properly filed and paid to avoid procedural defects.

XXVI. Reliefs That May Be Asked

A petition for certiorari against an MTCC decision or order may ask the RTC to:

Annul or set aside the assailed MTCC decision or order;
Declare the challenged proceedings void;
Direct the MTCC to desist from further proceedings;
Direct the MTCC to perform a specific act required by law;
Issue a temporary restraining order;
Issue a writ of preliminary injunction;
Maintain the status quo;
Grant other just and equitable reliefs.

The relief requested should be tailored to the jurisdictional error alleged.

XXVII. Standard of Review by the RTC

When acting on a petition for certiorari, the RTC does not act as a regular appellate court reviewing every factual or legal issue. It examines whether the MTCC acted without jurisdiction, in excess of jurisdiction, or with grave abuse of discretion.

The RTC may dismiss the petition if it finds that:

The alleged errors are merely errors of judgment;
Appeal was available and adequate;
The petition was filed late;
No prior motion for reconsideration was filed and no exception applies;
The petition violates hierarchy, forum shopping, or procedural requirements;
The petition lacks merit.

XXVIII. What Happens After the RTC Decides the Certiorari Petition?

If the RTC grants the petition, it may annul the MTCC order or decision and direct appropriate action.

If the RTC denies or dismisses the petition, the aggrieved party may consider further remedies, depending on the nature of the RTC ruling.

Possible remedies may include appeal or further special civil action, subject to the Rules of Court and controlling jurisprudence. The proper remedy depends on whether the RTC acted in its original jurisdiction on certiorari, the nature of the case, and the specific judgment rendered.

Because this stage can be procedurally technical, careful legal analysis is necessary.

XXIX. Common Mistakes

1. Filing Certiorari Instead of Appeal

This is the most common error. If the MTCC decision is appealable, the remedy is generally appeal, not certiorari.

2. Filing in the Court of Appeals Without Justification

Even if the CA has concurrent jurisdiction in some Rule 65 matters, direct filing may violate the hierarchy of courts.

3. Missing the 60-Day Period

Certiorari must be filed within the reglementary period. Delay can be fatal.

4. Failing to File a Motion for Reconsideration

A prior motion for reconsideration is generally required unless an exception applies.

5. Alleging Mere Error, Not Grave Abuse

A petition must show jurisdictional error or grave abuse of discretion. Ordinary mistakes are not enough.

6. Failing to Attach Material Documents

The court must be able to assess the alleged error from the petition and attachments.

7. Assuming Filing Stops Execution

Certiorari does not automatically stay enforcement. Injunctive relief must be sought and granted.

8. Using Certiorari to Delay

Courts may dismiss petitions that appear dilatory or frivolous.

XXX. Practical Guide: Determining the Correct Forum

A party may use the following guide:

Step 1: Identify the issuing court

Was the decision or order issued by an MTCC?

If yes, proceed to Step 2.

Step 2: Identify the alleged error

Is the complaint that the MTCC was simply wrong on the facts or law?

If yes, the remedy is likely appeal, not certiorari.

Is the complaint that the MTCC acted without jurisdiction, in excess of jurisdiction, or with grave abuse of discretion?

If yes, certiorari may be considered.

Step 3: Check if appeal is available

If appeal is available and adequate, certiorari will generally not prosper.

If no appeal or adequate remedy exists, proceed to Step 4.

Step 4: File in the proper court

The petition should generally be filed with the Regional Trial Court exercising supervisory jurisdiction over the MTCC.

Step 5: Consider urgent relief

If execution or enforcement is imminent, include an application for TRO or preliminary injunction.

XXXI. Illustrative Examples

Example 1: Wrong Remedy

The MTCC renders judgment in an ejectment case against the defendant. The defendant argues that the MTCC believed the wrong witness and misread the lease contract.

The proper remedy is generally appeal to the RTC, not certiorari.

Example 2: Possible Certiorari

The MTCC proceeds with a case despite obvious lack of jurisdiction and denies a motion to dismiss in a manner that leaves the respondent with no adequate remedy.

A petition for certiorari may be filed with the RTC exercising jurisdiction over the MTCC.

Example 3: Small Claims Judgment

The MTCC decides a small claims case. The losing party cannot appeal, but claims the MTCC denied due process by deciding without notice or opportunity to be heard.

A Rule 65 petition may be considered, generally before the proper RTC, but only if grave abuse or jurisdictional error is shown.

Example 4: Execution Despite Appeal

A party timely perfects an appeal from an MTCC judgment, but the MTCC still issues execution without legal basis.

A petition for certiorari with injunctive relief may be filed with the proper RTC.

XXXII. Special Note on the Term “Decision”

A party asking about certiorari against an “MTCC decision” should be cautious. A decision is often final and appealable. If it is appealable, certiorari is generally improper.

Certiorari is more commonly used against:

Void orders;
Interlocutory orders issued with grave abuse;
Orders denying motions despite lack of jurisdiction;
Execution orders issued unlawfully;
Final judgments in special proceedings where appeal is unavailable, such as small claims, but only on jurisdictional or due process grounds.

Thus, the word “decision” should trigger careful analysis. If the adverse ruling is a regular final judgment, the first question should be: Is appeal available?

XXXIII. Petition for Certiorari Compared With Petition for Review

A petition for certiorari under Rule 65 is different from a petition for review or ordinary appeal.

Rule 65 Certiorari

Based on lack or excess of jurisdiction or grave abuse of discretion;
Requires no appeal or adequate remedy;
Filed within 60 days;
Not a substitute for appeal;
Generally filed against the tribunal and adverse party;
May involve annulment of void or gravely abusive acts.

Appeal or Petition for Review

Based on errors of judgment;
Available when rules provide appellate remedy;
Filed within the period prescribed for appeal;
Seeks review of factual or legal conclusions;
Does not require showing grave abuse of discretion.

Confusing these remedies can result in dismissal.

XXXIV. Certiorari and the Doctrine of Finality of Judgment

Once an MTCC decision becomes final and executory, it generally becomes immutable and unalterable. Certiorari cannot ordinarily be used to reopen a final judgment when the party simply failed to appeal.

However, if the judgment is void for lack of jurisdiction or serious denial of due process, certiorari or other extraordinary remedies may be considered, depending on the circumstances.

The doctrine of finality is strong. Courts protect final judgments to prevent endless litigation.

XXXV. Relation to Annulment of Judgment

In some situations, a party may consider annulment of judgment rather than certiorari, particularly where a judgment has become final and the grounds involve lack of jurisdiction or extrinsic fraud.

However, annulment of judgment has its own rules, grounds, periods, and forum requirements. It is not the same as certiorari.

Against first-level court judgments, the proper remedy and forum must be carefully determined based on the nature of the judgment, availability of appeal, finality, and ground relied upon.

XXXVI. Practical Drafting Considerations

A petition for certiorari against an MTCC ruling should be drafted with precision. It should not merely say that the MTCC was “wrong.” It should clearly allege:

What the MTCC did;
Why the act was beyond jurisdiction or gravely abusive;
Why appeal is unavailable or inadequate;
When notice of the assailed ruling was received;
Whether a motion for reconsideration was filed;
If not, why no motion was required;
What immediate harm will occur without relief;
What specific relief the RTC should grant.

The petition should avoid excessive factual narration unless necessary. The focus should be jurisdictional error.

XXXVII. Should the Petition Be Filed by a Lawyer?

A Rule 65 petition is technical. While individuals may represent themselves in some proceedings, a petition for certiorari involves strict procedural and substantive requirements.

Legal assistance is strongly advisable, especially where:

The case involves ejectment;
Execution is imminent;
There are jurisdictional issues;
The case involves criminal consequences;
A small claims judgment is being challenged;
The amount or property involved is significant;
The filing period is about to expire.

A defective petition may be dismissed outright.

XXXVIII. Summary of the Rule

The answer may be summarized as follows:

Situation	Usual Remedy	Usual Forum
MTCC made ordinary factual or legal error in a final decision	Appeal	RTC
MTCC acted without jurisdiction	Certiorari	RTC with supervisory jurisdiction
MTCC acted in excess of jurisdiction	Certiorari	RTC with supervisory jurisdiction
MTCC committed grave abuse of discretion and no adequate appeal exists	Certiorari	RTC with supervisory jurisdiction
Small claims judgment with due process or jurisdictional defect	Certiorari	RTC with supervisory jurisdiction
Direct resort to CA or Supreme Court	Exceptional only	Must justify hierarchy exception

XXXIX. Conclusion

A petition for certiorari against an MTCC decision or order is generally filed with the Regional Trial Court exercising supervisory jurisdiction over the MTCC. This follows the structure of Philippine courts and the doctrine of hierarchy of courts.

However, certiorari is not the ordinary remedy for every adverse MTCC decision. If the MTCC merely committed an alleged error of judgment, the proper remedy is usually appeal to the RTC. Certiorari under Rule 65 is available only when the MTCC acted without jurisdiction, in excess of jurisdiction, or with grave abuse of discretion amounting to lack or excess of jurisdiction, and when there is no appeal or any plain, speedy, and adequate remedy in the ordinary course of law.

The practical rule is therefore:

For ordinary MTCC errors, appeal to the RTC. For jurisdictional errors or grave abuse of discretion with no adequate appeal, file Rule 65 certiorari with the proper RTC. Direct filing with the Court of Appeals or Supreme Court is generally improper unless exceptional circumstances justify bypassing the lower court.