What it means
Normally, contracts arise when two parties agree on terms. A quasi-contract is different because there is no agreement, but a court decides that fairness requires payment anyway.
The law treats it as if a contract existed so that the unfairly benefited party must give back what they received. The idea is closely linked to unjust enrichment, which means one person gaining a benefit while another loses out, without legal justification.
Typical situations include paying someone by mistake, delivering goods or services that the recipient accepted without a formal order, or one party providing emergency help. The claimant must usually show that they provided something of value, the other party knowingly accepted it, and it would be unfair to let them keep it for free.
For businesses, quasi-contract claims often appear when paperwork is missing or a deal collapses halfway through. A supplier may have started work on the strength of an email, and the customer then cancels while keeping part of the work.
The court may award the reasonable value of what was delivered, not the profit the supplier hoped to make. That point is the key nuance: recovery under a quasi-contract is usually limited to the fair value of the benefit, often called quantum meruit (Latin for "as much as he deserved").
It does not normally include lost profits or damages for breach, because there was no promise to breach. The rules differ between legal systems, so advice should come from a qualified lawyer.
Good practice is to avoid relying on this remedy. Written agreements, purchase orders and clear approvals make quasi-contract disputes less likely, and they make it easier to recover payment on a stronger footing.
Finance teams should also have controls to catch overpayments quickly. Time limits also matter.
Claims based on unjust enrichment are subject to limitation periods, which means they must be brought within a set window after the benefit was received. A business that spots an overpayment or unpaid work should therefore raise the issue quickly, keep records of what was delivered and take advice early.
In practice
Real-world examples.
Example
A construction subcontractor begins pouring a foundation after a verbal go-ahead from a site manager. The developer later cancels the project but keeps the completed work. A court orders the developer to pay the reasonable value of the work done, even though no written contract existed.
Example
A bank accidentally pays $85,000 twice to the same supplier. The supplier keeps the extra amount, claiming it was part of a later invoice. The bank can bring a quasi-contract claim to recover the duplicate payment, because keeping it would be unjust enrichment.
Example
A marketing agency designs a campaign for a retailer at the request of a regional manager who lacked authority to sign. The retailer then uses the designs in stores. The agency may be able to claim the fair value of its work on a quasi-contract basis, though a court would look closely at whether the retailer knew the manager lacked authority.
Case study
Seen in the real world.
Cedar and Stone Fabrication is a fictional metal workshop used for illustration. It began cutting custom steel panels for a developer after a phone call confirming the order. Before the contract was signed, the developer changed plans, collected the finished panels and refused to pay, arguing that no deal had been signed.
In this illustrative scenario, the workshop sued for the value of the panels delivered. The court accepted that the developer had knowingly taken the benefit and ordered payment of the fair price of the panels, but not the profit from the cancelled remainder of the order. The workshop later changed its procedure so that no work starts without a signed order or a deposit.
The company's finance manager also reviewed its record of earlier jobs and found two small amounts that had been paid twice. Using the same reasoning, the team asked the suppliers to return the duplicates, and both agreed without a dispute. The episode led to a rule that every payment run is checked for repeats before release.
Watch out
Common mistakes.
- Treating a quasi-contract as a real contract. It is a court-imposed remedy, and the parties never agreed to terms.
- Expecting to recover lost profit. Recovery is usually limited to the fair value of the benefit given.
- Relying on verbal go-aheads to avoid paperwork. Written confirmation is far easier to prove and enforce.
Questions
People also ask.
What is the main purpose of a quasi-contract?
It prevents unjust enrichment by making the party who benefited pay for the value received.
What does quantum meruit mean?
It is a Latin phrase meaning "as much as he deserved", and refers to payment of the reasonable value of services or goods provided.
Is a quasi-contract the same as an implied contract?
No, an implied contract is based on the parties' conduct showing agreement, while a quasi-contract is imposed by law even without agreement.
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