(This article is written by Pranav Rajesh Jadhav, Dr. D.Y. Patil College of Law, Navi Mumbai, B.A. LL.B. (4th Year), during his internship at LeDroit India)
Scope of the Article
Here’s what this article walks you through:
What unjust enrichment actually means and why it exists
Where the doctrine came from, from English common law to Indian statute
The three conditions which must be met for a court to even entertain the claim
A section by section look at Sections 68 to 72 of the Indian Contract Act, 1872, with examples
How courts have actually applied the doctrine, via landmark and recent judgments
How unjust enrichment connects to restitution and quantum meruit
Where the doctrine is headed, beyond ordinary contract disputes, to tax and environmental law
Abstract
Unjust enrichment is the law’s way of saying you cannot walk away with something that was never rightfully yours, even if no contract was signed between you. This article looks at how this simple idea grew into a doctrine found in Sections 68 to 72 of the Indian Contract Act, 1872, the part of the law dealing with quasi-contracts. We look at what the three things one needs to prove before a court would step in, go through each of the five statutory provisions and how they apply, and how the concept connects to restitution and quantum meruit. We look in detail at how the Supreme Court has applied this doctrine in cases like Mahabir Kishore v. State of Madhya Pradesh, Sahakari Khand Udyog Mandal v. Commissioner of Central Excise and Indian Council for Enviro-Legal Action v. Union of India, and how far the doctrine has travelled into tax refunds, environmental damage and public law.
Keywords: Unjust Enrichment, Quasi-Contract, Indian Contract Act 1872, Restitution, Quantum Meruit, Sections 68-72.
1. Introduction
Imagine someone hands you a benefit, money, goods, or a service, but there was no contract between you two. What do you do? Tort law will not help you as nobody did anything wrong there. Contract law will not help you either as there is nothing to enforce. This is exactly the gap that the doctrine of unjust enrichment fills up. What interests me about this doctrine is how it quietly does its job. It does not ask whether anyone promised anything. It simply asks whether it was unfair that someone retained the benefit (unjust gain), and if the answer is yes, it makes the person return it.
This doctrine has found a place in Indian law as Sections 68 to 72 of the Indian Contract Act, 1872, and are tucked under a heading relations resembling those created by contract. Five short sections carry an entire branch of law called quasi-contracts. Let us go through what the doctrine’s meaning is, where it came from, how the Act frames it, and how our courts have shaped it.
2. What Does Unjust Enrichment Actually Mean
Unjust enrichment is when someone either receives or holds onto a benefit at another person’s cost, unjustly. The benefit could be money, property, a service, anything of value. The law is not concerned that one person gained and another lost; only that whether retaining that gain is unfair. If it was a gift or came through a valid contract, the doctrine has nothing to say about it. It only steps in when conscience says the benefit does not belong where it currently is.
There is an old Roman law line, nemo debet locupletari ex aliena jactura, that nothing bad happens if you profit from another person’s loss. One thing worth remembering, early on, is that this doctrine does not punish anyone. It simply puts things back where they should be.
3. Where Did This Doctrine Come From
3.1 The English Roots
Moses v. MacferlanYou can trace this doctrine to old common law actions like indebitatus assumpsit and the claim for money had and received, used to recover money wrongfully taken or retained. The case everyone points to is from 1760, where Lord Mansfield ruled that a person who had unjustly received money had to return it, purely on grounds of natural justice, whether or not he had ever promised to. Almost two hundred years later, in Fibrosa Spolka Akcyjna v. Fairbairn Lawson Combe Barbour Ltd. from 1943, Lord Wright made the point that any decent legal system needs to have a way to prevent a person from withholding money or a benefit taken from another person when it would go contrary to conscience to keep it. These two cases are still the ones Indian courts refer to even today.
3.2 How India Took It Forward
India did not simply copy the English approach; we put a version of this doctrine in statute early on, through Chapter V of the Indian Contract Act, 1872. Even before that, colonial courts were already dealing with obligations that had nothing to do with a formal agreement, recognising some duties existed purely to stop unfair gain. From the 1980s onwards, the Supreme Court applied this doctrine more seriously, using it not just for disputes between two private parties, but in tax refund cases, cases involving the government, and even for environmental damage, which we’ll get to shortly.
4. What You Need to Prove
Before a court accepts a claim of unjust enrichment, three things need to line up together.
Firstly, the other person actually gained something. This could be money, goods, a service, or getting out of paying something they owed.
Secondly, that gain was at your cost. Their benefit and your loss must be connected, and that one caused the other.
Lastly, and most importantly, there is no lawful reason for them to retain that. If it was a gift or came through a proper contract, none of this applies. The doctrine only kicks in when fairness demands the benefit go back.
These three points are not just theory for an exam; the Supreme Court relied on this framework in Sahakari Khand Udyog Mandal Ltd. v. Commissioner of Central Excise & Customs from 2005, which we’ll look at in Part 6.
5. Quasi-Contracts Under the Indian Contract Act, 1872
Chapter V of the Act, covering Sections 68 to 72, are called relations resembling those created by contract. There’s no offer, no acceptance, no consideration, yet the law creates an obligation, purely to prevent one person gaining unfairly at another’s expense. Let us go through each section once, and an example each.
5.1 Section 68: Supplying Necessaries to Someone Who Cannot Contract
Section 68 deals with necessaries supplied to someone who legally cannot enter a contract, think of a minor or someone of unsound mind. If you supply necessaries suited to that person’s station in life, you can recover the cost from their property. And necessaries here is not just food or clothes, it extends to whatever fits that person’s lifestyle and circumstances.
Say a guardian pays for the basic living and schooling costs of an orphaned minor. Even though the minor could never have signed a valid contract for these expenses, the guardian can recover the money from the minor’s estate. Something similar happened in Jai Indra Bahadur Singh v. Dilraj Kaur, where money given for a minor’s sister’s wedding was treated as a necessary and allowed to be recovered from the minor’s property.
5.2 Section 69: Paying Someone else’s Legal Debt to Protect Your Interest
Section 69 deals with a situation where you pay off a debt that a person was legally bound to pay, because that protects your interest. You get to recover that amount from the person who should have paid it in the first place.
A simple example is where you buy a property and to stop it from being auctioned off, you clear the municipal dues that the previous owner should have paid, you can recover that money from the previous owner. The Supreme Court took this view in Govindram Gordhandas Seksaria v. State of Gondal, someone who paid off municipal tax to stop a property sale was allowed to recover it from the person actually liable.
5.3 Section 70: Benefiting From Something Done for You but Not Intended as a Gift
Section 70 is probably the most commonly used among the five. It deals with when someone does something for you, or delivers something to you, not intending it as a gift, and you go ahead and enjoy that benefit. In that case, you owe compensation, or you need to return what was given.
If goods get delivered to your address by mistake and instead of returning them, you knowingly start using them as your own, you now owe compensation to the real owner. The court dealt with such a case in Modi Sugar Mills Ltd. v. Union of India, where containers given by the government for packaging biscuits made for it never got returned. The court held the containers still belonged to the government and the company had to pay for the benefit it kept. Section 70 is where the idea of quantum meruit finds its statutory footings, which we’ll look into in Part 7.
5.4 Section 71: If You Find Someone else’s Lost Goods
Section 71 deals with finding goods belonging to someone else and taking charge of them. The law now treats you the same way as a bailee (person holding property in trust). You need to take reasonable care of those goods and try to actually find their real owner rather than keep them.
A classic example (often cited in Indian textbooks) is the English case Newman v. Bourne & Hollingsworth, where a shop assistant carelessly misplaced a customer’s brooch left in a drawer for safekeeping.
5.5 Section 72: Getting Back Money Paid by Mistake or Under Pressure
Section 72 says that if you receive money, or anything else, by mistake, or because someone was coerced into giving it, you have to give it back. It doesn’t matter whether the mistake was about facts or law, and whether you acted in good faith or not. The duty to return the money exists because keeping it would be unjust.
If a railway company charges you extra freight due to a wrong assumption about which route your goods travelled, that excess amount has to be refunded. The court decided so in Associated Cement Co. Ltd. v. Union of India, where railway authorities had overcharged freight based on an incorrect route classification and the court ordered a refund of the excess.
6. How Courts Have Actually Applied This
Sections 68 to 72 give us the framework, but it is the courts that have made this doctrine work as it does. A few decisions stand out.
Mahabir Kishore v. State of Madhya Pradesh, (1989) 3 S.C.R. 596: A liquor contractor had been forced to pay an extra cess, that a court later struck down as illegal. The real question was how long the contractor had to file a suit for refund under Section 72, and in answering that, the Supreme Court went all the way back to the doctrine’s Roman law roots and cited the old maxim nul ne doit s’enrichir aux depens des autres, and confirmed that restitution is a quasi-contractual remedy rooted in fairness rather than any actual promise.
Sahakari Khand Udyog Mandal Ltd. v. Commissioner of Central Excise & Customs, (2005) 2 S.C.R. 606: This case involved a dispute over an excise duty refund. The Supreme Court explained that unjust enrichment simply means holding on to a benefit that is unfair to keep, and that the right to recover it comes up wherever keeping that benefit offends justice or equity. The court was clear that this obligation does not come from contract or tort, but from a separate category, quasi-contract or the law of restitution, and applies on its own even if there is no specific refund provision in a statute because the whole thing is based on equity.
Indian Council for Enviro-Legal Action v. Union of India (1996): This case might be the boldest use of the doctrine outside ordinary business disputes. Chemical industries in Bichhri village, Rajasthan had contaminated the soil and groundwater there. The Supreme Court ordered the industries to pay for cleaning up the environment and compensating the people affected. The court described unjust enrichment and restitution as two shades of green, essentially two sides of the same idea within the larger law of obligations. It also warned, as Padmawati v. Harijan Sewak Sangh did, that litigants should not be allowed to drag cases out just to hold onto an illegal benefit, and that courts should impose realistic costs to discourage that.
There is also M/s Nagpur Golden Transport Co. v. M/s Nath Traders from 2011, a good example of the doctrine functioning in purely commercial setting with no statute involved. A carrier returned damaged goods to the consignor (not accepted by the consignee), and the Supreme Court worked through the resulting rights between the parties using quasi-contractual reasoning.
7. Restitution and Unjust Enrichment
Restitution is simply the remedy side of the doctrine. It is how a court puts a wronged party back where it was before the unfair benefit ever came in. Depending on the facts, that might mean returning specific property, repaying money, reimbursing an expense, or paying compensation based on the value of what was taken. The Enviro-Legal Action case shows that restitution is not limited to private commercial disputes. It has stretched into public law remedies against polluters, and in principle it could reach any situation where someone profited from wrongdoing or misusing the legal process.
8. Quantum Meruit and How It Fits In
Quantum meruit literally means as much as is earned. It allows one to recover the fair value of work done, in situations where a contract could not be completed or was blocked by the other party. It is close to unjust enrichment but is not quite the same thing. Quantum meruit looks at the value of what you did. Unjust enrichment looks at the value of what other person kept. In Indian law, Section 70 is where quantum meruit lives on the statute books, allowing one to claim compensation whenever they perform a non-gratuitous act for another person who then knowingly accepts and enjoys the benefit of that act.
9. Where This Doctrine Is Heading
What makes unjust enrichment interesting to follow is that it has moved out of its quasi-contract boundaries into other areas. Indian courts have been using it in a few different areas.
Tax and excise law is one such big example. Courts use the doctrine to decide whether a refund of wrongly collected duty should go to the company that paid it, or to a consumer welfare fund instead, depending on whether that cost was passed on to the end consumer. You see this in the line of cases following Sahakari Khand Udyog Mandal and in an earlier nine judge bench ruling in Mafatlal Industries Ltd. v. Union of India from 1997.
Environmental law is another. Polluters get made to pay for cleaning up the damage they caused. Exactly as the Enviro-Legal Action case.
And more generally, courts treat unjust enrichment as its own independent equitable principle in public law and constitutional matters, not just something that comes along with contract law.
All that points towards unjust enrichment becoming a third pillar of law of obligations, as opposed to something that exists in shadow to contract and tort, which is how most other common law countries treat it.
10. A Few Honest Observations
Two things stood out for me as a student, while studying this doctrine. One, that Sections 68 to 72 were written in 1872, and they have barely needed any changes even as the doctrine now covers excise refunds and environmental damage that nobody in 1872 could have imagined. This says quite a lot about how well the original drafting was. Two, the very flexibility that makes this doctrine useful, its reliance on notions of justice, equity and good conscience, is also its biggest risk. It allows courts to do the right thing in situations that nobody had planned for, but it also demands for discipline so that it does not become a vague catch all remedy every time there is a specific contract or statute based remedy.
When the Supreme Court insists on going through the three part test we discussed in Part 4, as it did in Sahakari Khand Udyog Mandal, that is when the court is holding itself to exactly this discipline.
11. Wrapping Up
Unjust enrichment plays its part quietly in the law of obligations. It fills the space that contract and tort law leave, making sure that nobody profits unfairly at another person’s cost just because there was no agreement between them. This happens in India largely through Sections 68 to 72 of the Indian Contract Act, 1872, and the decades of judicial reasoning that has expanded on it. From necessaries given to a minor, to excise duty refunds, and to cleaning up polluted land, this doctrine has reached places its nineteenth century drafters never anticipated. And that, in a way, is the best proof of how solid the original idea was: nobody should be able to retain what, in fairness, belongs.
