Short answer. Article 1369 leaves the reformation procedure to the Rules of Court promulgated by the Supreme Court rather than spelling it out itself. In practice, a party seeking reformation files an ordinary civil action, pleads facts showing the instrument fails to reflect the true agreement, and proves those facts under the ordinary rules of evidence and procedure.
What the law says
The procedure for the reformation of instrument shall be governed by rules of court to be promulgated by the Supreme Court.
Civil Code, Article 1369 — Procedure for Reformation. Read the full provision →
What Article 1369 actually provides
Article 1369 is a short procedural bridge. The preceding articles of this chapter set out when a written contract may be reformed because it fails to express the true intention of the parties. Article 1369 simply confirms that how a party brings and proves that claim in court is left to the Rules of Court issued by the Supreme Court, not spelled out in the Civil Code itself. This division of labor is deliberate: the Civil Code fixes the substantive right to reformation, while the Supreme Court's rule-making power fills in the procedural steps for enforcing that right.
How a reformation case is actually filed
Because no special procedure exists, a party seeking reformation files an ordinary civil action in the proper trial court. The complaint must allege the facts showing that the written instrument does not reflect what the parties truly agreed, such as a mutual mistake, fraud, inequitable conduct, or an accident in drafting. The case then proceeds like any other civil action, including pre-trial and presentation of evidence.
Proving the true agreement
Since the whole point of reformation is that the writing itself is wrong, the party seeking it must offer evidence beyond the document, such as testimony, drafts, correspondence, or other circumstances showing the real understanding between the parties. Philippine courts require clear and convincing proof before disturbing a signed instrument, because written contracts are presumed to reflect what the parties intended.
Why timing and documentation matter
A reformation claim can be defeated by delay or by a lack of credible supporting evidence, so gathering drafts, communications, and witnesses early strengthens the case considerably. Anyone who suspects that a signed contract does not match what was actually agreed should preserve any available proof of the true terms and consult a lawyer about filing before memories fade or documents are lost.
When this differs from other contract remedies
Reformation is different from voiding a contract altogether. It does not undo the underlying agreement; it simply corrects the written expression of what the parties already consented to, so the contract remains valid and enforceable once the court orders the correction. Because the underlying obligation survives, either party may still enforce performance under the corrected terms once reformation is granted. Understanding this distinction helps in deciding whether reformation, rather than annulment or rescission, is the right procedural route to pursue.
Related provisions
- Civil Code, Article 1369 — Procedure for Reformation
- Civil Code, Article 1368 — Who May Seek Reformation
- Civil Code, Article 1370 — Literal Meaning Controls; Intent Prevails