Difference Between Special Leave Petition, Review Petition, Curative Petition and Mercy Petition 

India’s legal system is built on two important ideas that must work together: finality of decisions and fairness in justice delivery. Finality is necessary because litigation cannot continue endlessly. At the same time, fairness requires that a serious legal mistake, a violation of natural justice, or an exceptional situation should not leave an individual without any remedy. This is why certain legal and constitutional remedies exist even after a case has travelled through courts.

In public discussions around major Supreme Court matters, four terms frequently appear: Special Leave Petition (SLP), Review Petition, Curative Petition, and Mercy Petition. These are not the same. They operate at different stages, have different purposes, follow different procedures, and involve different authorities. Some are judicial remedies within the court system, while one is an executive remedy under the Constitution.

This article explains each remedy and then sets out the key differences through a table and aspect-wise explanation.

What is a Special Leave Petition (SLP)?

A Special Leave Petition (SLP) is a petition filed before the Supreme Court seeking special permission (leave) to appeal against a judgement, decree, determination, sentence, or order passed by any court or tribunal in India. It is described as a constitutional route because it does not depend on a regular appeal provision in a statute.

An SLP is important because it is not an appeal by default. It is a request to the Supreme Court to allow an appeal. The Supreme Court may grant leave if it finds that the matter deserves its attention, or it may refuse to grant leave. Therefore, it is a discretionary remedy.

What is a Review Petition?

A Review Petition is a petition filed before a court requesting it to review its own order or judgement which it has already pronounced. In the Supreme Court context, the review petition is a narrow remedy to correct a glaring omission, patent mistake, or other grave error that has led to a miscarriage of justice.

A review petition is not meant to provide a second chance to argue the entire case. The Supreme Court, while reviewing, does not take a fresh look at the matter as if it is hearing an appeal again. It only corrects serious errors that are apparent and that have real impact on justice.

The content also links review jurisdiction to the idea that review is an exception to stare decisis, the principle that courts follow precedents. Review exists because even courts can commit errors, and the legal system provides a limited method to correct them.

What is a Curative Petition?

A Curative Petition is the last judicial option available to an individual after a review petition is dismissed by the Supreme Court. It is described as a judicial innovation in the Indian legal system. It is not meant for routine use. It is intended for rare circumstances where a final judgement has resulted in gross miscarriage of justice, especially due to violation of natural justice or apprehension of bias.

A curative petition usually does not receive an open-court hearing and is normally decided in chambers unless the Court permits otherwise. The Supreme Court is extremely cautious while dealing with these petitions.

What is a Mercy Petition?

A Mercy Petition is a remedy outside the judicial process and operates as an executive clemency mechanism. It is generally regarded as the last resort after available legal remedies are exhausted, particularly in cases involving severe sentences including death sentence matters. It is decided on the basis of mercy and broader considerations rather than strict legality of conviction.

It is also stated in the content that even though the mercy petition is filed before the President or Governor, practically the decision is taken by the Council of Ministers, and that arbitrary decisions on mercy pleas can be questioned in court.

Key Differences: SLP vs Review Petition vs Curative Petition vs Mercy Petition

Stage at which each remedy is used

SLP is used to approach the Supreme Court from a lower court or tribunal decision. Review petition comes after the Supreme Court’s decision. Curative petition comes only after review is dismissed. Mercy petition is usually pursued when judicial remedies have ended, especially in death sentence situations.

Purpose and objective

SLP seeks permission to appeal and bring the matter to the Supreme Court’s attention. Review corrects patent mistakes or grave errors. Curative addresses exceptional circumstances of gross injustice, especially procedural unfairness. Mercy petition seeks clemency and relief on humanitarian or broader grounds.

Nature of authority deciding the petition

SLP, review and curative petitions are decided by judges of the Supreme Court. Mercy petitions are decided by the executive constitutional authority (President or Governor), acting on the aid and advice of the Council of Ministers.

Scope and strictness of scrutiny

SLP is discretionary and may be rejected at threshold. Review is strictly limited and cannot be used like an appeal. This is reinforced by Union of India v. Sandur Manganese & Iron Ores Ltd (2013), which clarifies that review is not an appeal in disguise. 

Curative is even stricter, and its origin in Rupa Ashok Hurra (2002) shows that it exists to cure gross miscarriage of justice where court’s own process has caused prejudice. Mercy is not aimed at re-deciding guilt; it is an act of grace and cannot be claimed as a matter of right, as stated in Kehar Singh (1988).

Procedure and hearing pattern

SLP involves admission-stage scrutiny, and the Court may grant or deny leave. Review is usually decided through circulation without oral arguments, though death penalty review petitions were directed to be heard in open court by a three-judge bench as noted in the 2014 reference in the content. 

Curative petitions are usually decided in chambers with strict internal circulation procedure and possible exemplary costs. Mercy petitions move through executive channels, with the President’s secretariat forwarding it to the Ministry of Home Affairs for advice of the Cabinet, and there is no written time limit specified in the Constitution.

Role in death sentence cases

In death sentence matters, the remedies are often discussed in a sequence. After the Supreme Court’s final decision, review and curative petitions may be pursued, and then a mercy petition may be filed under Articles 72/161. The content also notes that delay in execution can raise constitutional concerns, discussed in Shatrughan Chauhan v. Union of India.

Conclusion

Special Leave Petition, Review Petition, Curative Petition and Mercy Petition operate at different stages and serve different constitutional purposes. SLP under Article 136 is a discretionary gateway for Supreme Court intervention against lower court or tribunal decisions. 

Review under Article 137 is a limited correction mechanism for patent errors and is not a re-hearing, as reinforced in Union of India v. Sandur Manganese & Iron Ores Ltd (2013). Curative petition, evolved in Rupa Ashok Hurra v. Ashok Hurra (2002), is the rarest judicial safeguard to prevent gross miscarriage of justice, guided by the principle actus curiae neminem gravabit. 

Mercy petition under Articles 72 and 161 is an executive clemency remedy, described as an act of grace in Kehar Singh v. Union of India (1988), and procedural delays in death sentence execution have been discussed as constitutionally significant in Shatrughan Chauhan v. Union of India.

Together, these remedies show how the Indian constitutional framework attempts to balance finality with fairness, ensuring that narrow but meaningful avenues remain available to prevent serious injustice.