Public Interest Litigation (PIL) is a legal mechanism that allows individuals or groups to file petitions in court for issues affecting the public at large, especially when the rights of underprivileged or marginalized sections are involved. The primary purpose of PIL is to promote social justice and protect the public interest by holding authorities accountable for actions that infringe on fundamental rights, environmental protection, or governance lapses. PIL enables courts to address issues of broad public concern, ensuring that justice is accessible even to those who lack the means or knowledge to approach the judiciary directly.

PIL differs from regular litigation mainly in terms of its scope and the parties involved. Regular litigation typically concerns disputes between two private parties, focusing on individual rights or grievances. PIL, on the other hand, is meant to address matters affecting society as a whole or a large section of people. Additionally, PIL allows any concerned individual, NGO, or public-spirited citizen to approach the court, even if they are not directly affected by the issue. This relaxation of the locus standi rule makes PIL a unique judicial remedy for public welfare and systemic reforms.

PIL is suitable for cases involving matters of public interest that affect a large segment of society. This includes environmental issues, human rights violations, corruption in public offices, exploitation of labor, lack of basic amenities, or violations of constitutional rights impacting marginalized groups. PIL can also be filed in situations where government actions or inactions harm public welfare or violate statutory duties. However, PIL is not intended for personal grievances, business rivalries, or disputes that primarily benefit an individual or a small group, as such cases are best addressed through regular legal proceedings.

Filing a PIL for personal grievances is considered misuse because it diverts the court’s limited time and resources from genuine issues of public importance to private disputes. PIL is designed to address systemic problems affecting large sections of society, not to resolve individual matters such as property disputes, contractual disagreements, or personal vendettas. Misusing PIL for personal interests undermines its credibility and hampers access to justice for those with legitimate public interest concerns. Courts have cautioned against such practices and may penalize petitioners who use PIL as a tool for personal gain or publicity.

To curb misuse, courts have implemented strict guidelines, including requiring petitioners to disclose their credentials and motives when filing a PIL. Courts also assess whether the issue affects public interest or a large section of society before admitting the petition. In cases where PILs are found to be frivolous or motivated by personal gain, courts may dismiss them with heavy costs or penalties. Additionally, landmark judgments such as Balwant Singh Chaufal v. State of Uttaranchal have clarified that PILs must serve the larger public good, reinforcing that the judiciary will not entertain petitions filed for private benefit.