Understanding Contract Types: From Express to Quasi, Exploring the Spectrum of Legal Agreements


Contracts are legal agreements that bind parties involved in a transaction or business deal. It outlines the obligations, responsibilities, and rights of each party and provides a framework within which they can conduct their business. Different types of contracts exist, each with its unique characteristics and legal implications.

Certainly! Let's delve into each of the contract types, including quasi-contract, and explain them in detail:

1. Express Contract: An express contract is formed when the parties involved explicitly state their agreement, either verbally or in writing. All terms and conditions are clearly defined, and the parties are aware of their obligations. Express contracts often include detailed provisions regarding the rights and responsibilities of each party, the scope of the agreement, payment terms, and any other relevant terms agreed upon.


2. Implied Contract: An implied contract is not explicitly stated in words, but it is inferred from the conduct or behaviour of the parties involved. These contracts are based on the actions, circumstances, and course of dealing between the parties. The law recognizes implied contracts to ensure fairness and justice when parties act in a way that indicates an intention to create a contractual relationship.

For example, if you enter a restaurant, order a meal, and consume it, there is an implied contract that you will pay for the meal. The restaurant's provision of food and your act of consuming it imply an agreement to pay for the services rendered.

3. Unilateral Contract: A unilateral contract involves one party making a promise or offer that can only be accepted by the other party's performance of a specific act. The contract is formed upon completion of the requested act.

For instance, a unilateral contract is created if you offer a reward for finding your lost dog. The person who finds the dog and performs the act of returning it accepts the offer and fulfills the condition for receiving the reward.

4. Bilateral Contract: A bilateral contract is an agreement in which both parties exchange promises to perform certain acts or obligations. Each party is bound to fulfill their promise, and the contract is formed upon mutual promises.

An example of a bilateral contract is a typical sales agreement. The buyer promises to pay the agreed price, and the seller promises to deliver the specified goods. Both parties have reciprocal obligations; the contract is formed when the promises are exchanged.

5. Executed Contract: An executed contract is a contract in which both parties have fulfilled their obligations according to the agreed terms. All actions required by the contract have been completed, and both parties have performed their duties. Once an executed contract is fulfilled, it no longer requires any further performance from either party.

For instance, if you hire a painter to paint your house, and they complete the job to your satisfaction and receive the agreed payment, it becomes an executed contract.

6. Executory Contract: In contrast to an executed contract, an executory contract is a contract in which one or both parties have not yet fulfilled their obligations. The contract is still in progress, and the parties have yet to perform their respective duties.

For example, if you hire a construction company to build a house, and they have only started the foundation work, the contract remains executory until the construction is completed.

7. Void Contract: A void contract is an agreement that is considered legally invalid from the beginning, usually due to its subject matter or the manner in which it was formed. It has no legal effect, and the parties are not bound by its terms. A void contract cannot be enforced by either party.

An example of a void contract is an agreement to engage in illegal activities. For instance, a contract to sell illicit drugs would be void and unenforceable.

8. Voidable Contract: A voidable contract is a contract that is initially valid, but due to certain defects or circumstances, one or both parties have the option to either enforce or void the contract. The party with the right to void the contract can either affirm or reject it.

One common example of a voidable contract is a contract entered into under duress, where one party is coerced or forced into an agreement against their will. The coerced party has the option to either affirm the contract or seek to void it.

9. Quasi-Contract: A quasi-contract, also known as an implied-in-law contract or a constructive contract, is not a true contract but a legal fiction used by courts to prevent unjust enrichment. It is an obligation imposed by law to prevent one party from benefiting at the expense of another when no actual contract exists between them.

Quasi-contracts are based on the principle of fairness and equitable considerations. They arise when one party has received a benefit from another party, and it would be unfair for the recipient to retain that benefit without compensating the provider.

For instance, if you mistakenly pay someone twice for a service rendered, the law might imply a quasi-contractual obligation on the recipient to return the excess payment. The recipient would be unjustly enriched if they were allowed to keep both payments.

The various types of contracts described above encompass a range of legal relationships, obligations, and circumstances. Understanding these contract types helps in determining the rights, duties, and enforceability of agreements in different situations.

In conclusion, business transactions involve several legal requirements and obligations, which is where contracts come in. Choosing the right contract type is crucial for navigating the legal landscape and ensuring that business obligations are met. Understanding the different types of contracts can help organizations to make informed decisions and implement best practices when entering or terminating a contract.

CS Haridatta Sharma

CS Haridatta Sharma is an Associate Member of the Institute of Company Secretaries of India (ICSI) having good experience in legal and secretarial matters. He is a graduate from Utkal University, Odisha and Post graduate from Pt. Ravishankar Shukla University, Chhattisgarh.

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