Short answer. You have fifteen days from notice of the judgment or final resolution to file a motion for reconsideration in the Court of Appeals. The motion must include proof that you served a copy on the adverse party, or the court can disregard it as a mere scrap of paper.

What the law says

A party may file a motion for reconsideration of a judgment or final resolution within fifteen days from notice thereof, with proof of service on the adverse party.

Rule 52, Section 1 — Period for filing. Read the full provision →

The fifteen-day window

Rule 52, Section 1 gives a losing party a fixed fifteen-day period, counted from notice of the judgment or final resolution, to ask the Court of Appeals to reconsider its own ruling. Notice means the date the party (or counsel) actually received the decision, not the date it was signed or promulgated. Missing this window generally means the decision becomes final and executory, closing off reconsideration as a remedy and leaving appeal to the Supreme Court as the only avenue left, subject to its own separate deadline.

Why proof of service matters

The section does not stop at the deadline — it also conditions the motion on proof that the adverse party was served a copy. This reflects the basic due-process rule that every contested motion must be brought to the other side's attention so they have a chance to oppose it. A motion for reconsideration filed without proof of service is treated as not having been filed at all for purposes of tolling the period, which can be fatal if the fifteen days later lapse while the defect goes uncorrected. This binds the moving party specifically: it is the movant's responsibility to serve the adverse party and to attach the proof, not the court's job to chase down whether service happened before acting on the motion.

What this section does not cover

Section 1 only fixes the period and the service requirement; it does not state the grounds a motion for reconsideration may raise, how many such motions a party may file, or what happens once the motion is submitted. It likewise says nothing about whether the fifteen-day period itself can be extended, or about the particular form the proof of service must take beyond accompanying the motion. Nor does it address what the Court of Appeals must do with a motion that is timely and properly served — whether it must grant, deny, or otherwise act on it within any set period. Those additional questions are governed by the sections that follow within Rule 52, not by Section 1 alone.

Related provisions

Note. Statute text quoted on this page is reproduced from the official enactment and is linked to the full provision. The explanation around it is general legal information from Vivas & Nobles Law Office, not legal advice. Whether it applies to your situation depends on facts only a lawyer reviewing them can assess.