RSA stands for Regular Second Appeal. It is a civil appeal filed before the High Court under Section 100 of the Code of Civil Procedure, 1908 (CPC) challenging a decree passed in a First Appeal by a court subordinate to the High Court — but only when the High Court is satisfied that the case involves a substantial question of law.
The word “Regular” distinguishes this from other types of appeals (like Letters Patent Appeals or Constitutional appeals). RSA is the standard, ordinary second-level appeal in the civil appellate hierarchy — the third tier of civil adjudication after the trial court and the first appellate court.

What Is a “Substantial Question of Law”?
The most critical — and litigated — concept in RSA is the “substantial question of law.” Without a substantial question of law, the High Court cannot entertain an RSA.
The Supreme Court in Santosh Hazari v. Purushottam Tiwari (2001) defined a substantial question of law as one that:
- Is not previously settled by the Supreme Court or the relevant High Court
- Has a direct bearing on the outcome of the case
- Requires detailed examination and determination
The question must be legal — factual errors by the trial court or First Appellate Court (even if significant) are generally not valid grounds for RSA unless they amount to perverse findings that give rise to a question of law.
The Civil Appellate Hierarchy — Where RSA Fits
Understanding RSA requires understanding the full civil appeal structure:
| Level | Court | Type of Proceeding |
| 1st | Trial Court (Civil Judge/Munsiff) | Original civil suit |
| 2nd | First Appellate Court (District Judge) | First Appeal (Regular First Appeal/RFA) |
| 3rd | High Court | Second Appeal (RSA) — on substantial question of law |
| 4th | Supreme Court | SLP under Article 136 |
RSA is available from every decree passed in appeal by any court subordinate to the High Court — meaning from a District Judge’s First Appeal decree, not directly from a trial court decree.
Filing a Regular Second Appeal — The Process
Step 1: Identify the Substantial Question of Law The most crucial step. The memorandum of RSA must precisely state the substantial question(s) of law involved. If no such question is identified or accepted by the High Court, the RSA is dismissed at the threshold.
Step 2: File Within 90 Days The RSA must be filed in the High Court within 90 days of the First Appellate Court’s decree. Delay can be condoned on showing sufficient cause.
Step 3: Admission Hearing The High Court first hears the RSA on the question of whether it should be admitted — i.e., whether there is a substantial question of law that warrants the High Court’s consideration.
Step 4: Framing the Question If admitted, the High Court formally frames the substantial question(s) of law. The case is then heard on those questions alone.
Step 5: Final Decision The High Court decides the case, restricting itself to the framed questions of law. It cannot re-appreciate factual evidence or overturn factual findings unless they are perverse.
RSA vs. First Appeal (RFA) — Key Differences
| Feature | RSA | First Appeal (RFA) |
| Stage | Third tier | Second tier |
| Filed In | High Court | District Court / High Court |
| Scope | Only substantial question of law | Both facts and law |
| Legal Basis | Section 100 CPC | Section 96 CPC |
| Flexibility | Narrow — facts generally not re-examined | Wide — court can examine facts and law |
| Time Limit | 90 days | 30–90 days (varies) |
Frequently Asked Questions (FAQs)
Q: What is the full form of RSA in law?
A: RSA stands for Regular Second Appeal — a civil appeal to the High Court under Section 100 CPC from a decree passed in a First Appeal, maintainable only on substantial questions of law.
Q: What is Section 100 CPC?
A: Section 100 CPC governs Regular Second Appeals — providing that an RSA lies to the High Court from every decree passed in appeal by a court subordinate to the High Court, if the case involves a substantial question of law.
Q: Can facts be re-examined in an RSA?
A: Generally, no. RSA is restricted to substantial questions of law. The High Court cannot re-examine or re-appreciate evidence unless factual findings are so perverse as to give rise to a question of law.
Q: What is a substantial question of law?
A: A substantial question of law is one that is not previously settled, has direct bearing on the case’s outcome, and requires detailed legal examination. Pure factual disputes are not substantial questions of law.
Q: What is the time limit for filing an RSA?
A: 90 days from the date of the First Appellate Court’s decree. Delay can be condoned under Section 5 of the Limitation Act, 1963 if sufficient cause is shown.
Q: Can an RSA be dismissed without hearing?
A: Yes. If the High Court is not satisfied that a substantial question of law exists, it can dismiss the RSA at the admission stage itself — without issuing notice to the other side.
Q: Is RSA available in criminal cases?
A: No. RSA is a civil law concept under CPC. Criminal appeals have their own hierarchy (Sessions Court → High Court → Supreme Court) governed by CrPC/BNSS.
Q: After the High Court decides an RSA, what is the further remedy?
A: After the High Court decides an RSA, the aggrieved party can approach the Supreme Court through a Special Leave Petition (SLP) under Article 136 of the Constitution.