Contracts are an essential part of everyday transactions, governing agreements between individuals, businesses, and organizations. They define the obligations and expectations of the parties involved, ensuring legal enforceability.
One important type of contract is a unilateral contract, where one party makes a promise that the other party can accept only through performance, not by making a return promise. Unlike bilateral contracts, where both parties commit to obligations, unilateral contracts create a one-sided obligation that becomes legally binding only when the requested action is completed.
These contracts are commonly seen in reward offers, service incentives, and real estate agreements, making them an important concept in contract law. This article explores what a unilateral contract is, how it differs from a bilateral contract, real-world examples, and its role in real estate transactions.
What is a Unilateral Contract?
A unilateral contract is a type of agreement in which one party makes a promise that the other party can accept only by performing a specific action. Unlike a bilateral contract, where both parties exchange promises, a unilateral contract does not require the second party to make any commitment. The contract becomes binding only when the requested action is completed.
For example, if a company offers a reward for finding a lost item, the contract is only enforceable if someone actually finds and returns the item. The company is not obligated to pay unless the condition is met. Similarly, an employer might offer a bonus to employees who achieve a specific performance goal. The contract is fulfilled when the employee completes the required task.
Unilateral contracts are often used in situations where the offeror wants to encourage a specific action without requiring the offeree to make any promises or commitments in return. This flexibility makes them useful for rewards, service-based incentives, and agreements.
Related Read: Learn How to Sign Digital Contracts
Unilateral vs. Bilateral Contracts
Contracts generally fall into two main categories: unilateral and bilateral. While both are legally binding, they function differently in terms of obligations and enforceability.
A unilateral contract involves only one party making a promise. The contract becomes valid only when the other party completes the required action. The offeree is not obligated to act, but if they do, the offeror must fulfill their promise. An example is a reward offer—if a person offers $500 for the return of a lost dog, they are only required to pay if someone returns the dog.
A bilateral contract, on the other hand, requires both parties to exchange promises. Each party is legally bound to fulfill their end of the agreement. A common example is a job contract, where an employer promises to pay an employee a salary, and in return, the employee agrees to work a set number of hours.
Key Differences:
| Aspect | Unilateral Contract | Bilateral Contract |
|---|---|---|
| Number of Promises | One party makes a promise | Both parties make promises to each other |
| Obligation | Only the offeror is legally bound once performance is completed | Both parties are legally bound from the start |
| Formation | Formed when the requested action is performed | Formed when both parties agree to their obligations |
| Example | A reward for finding a lost pet | A sales contract where one party agrees to deliver goods, and the other agrees to pay |
Both types of contracts serve different purposes. Unilateral contracts are useful when an individual or business wants to encourage a specific action without requiring a direct agreement, while bilateral contracts are more common in everyday business and personal transactions.
Discover 13 Reasons Why Enterprises Love Certinal eSign
Unilateral Contract Examples
Unilateral contracts are widely used in everyday life and business transactions. They are particularly useful when one party wants to encourage a specific action without requiring a formal agreement from the other party. Below are some common examples of unilateral contracts:
1. Reward Offers
One of the most well-known examples is a public reward offer. If someone posts a notice stating, “I will pay $500 to anyone who finds and returns my lost dog,” this constitutes a unilateral contract. The person offering the reward is only obligated to pay if someone successfully completes the action—finding and returning the dog.
2. Contests and Sweepstakes
Companies frequently run contests where participants must complete a certain task, such as submitting an entry, solving a puzzle, or achieving a high score in a game. The company is only required to deliver the promised prize to the winner, and participants are not obligated to enter.
3. Service-Based Incentives
Employers may offer performance-based bonuses or commissions. For example, a company may promise a $5,000 bonus to sales representatives who exceed a specific sales target. The company is only required to pay the bonus if the employee reaches the goal, making it a unilateral contract.
4. Insurance Policies
Some types of insurance contracts function as unilateral agreements. An insurance provider may promise to pay for damages under specific conditions (such as an accident or medical emergency). The insured party is not required to make a claim, but if they do, the insurance company must fulfill the policy terms.
Unilateral Contracts in Real Estate
Unilateral contracts are widely used in the real estate industry, particularly in agreements where one party makes an offer that is only binding once the other party takes a specific action. These contracts provide flexibility for property owners, buyers, and agents while ensuring that certain commitments are honored upon performance.
1. Option Contracts
In real estate, an option contract allows a buyer the exclusive right to purchase a property within a specified period at a predetermined price. The seller makes a promise to keep the offer open, but the buyer is not obligated to complete the purchase. If the buyer decides to proceed within the agreed timeframe, the seller must honor the contract.
2. Open Listings
A property owner may list a home with multiple real estate agents without committing to a single broker. The owner agrees to pay a commission only to the agent who successfully finds a buyer. Since the agents are not required to act, but the seller is obligated to pay the commission if a sale occurs, this arrangement qualifies as a unilateral contract.
3. Commission Agreements
A seller may promise to pay a real estate agent a commission if they bring a qualified buyer to purchase a property. The agent is not required to actively seek buyers, but if they do and the transaction is completed, the seller must pay the commission.
These examples demonstrate how unilateral contracts provide flexibility and legal protection in real estate transactions, allowing parties to engage without immediate obligations while ensuring commitments are honored when specific conditions are met.
Deep Dive into Comprehensive Guide to Electronic Signature for Real Estate
Legal Considerations in Unilateral Contracts
While unilateral contracts offer flexibility, they also come with specific legal considerations that determine their enforceability and fairness. These factors ensure that both parties understand their rights and obligations under the contract.
1. Enforceability of Unilateral Contracts
A unilateral contract becomes legally binding only when the offeree performs the requested action. Until then, the offeror has no legal recourse if the action is not completed. However, once the action is performed, the offeror is obligated to fulfill their promise, such as paying a reward or granting a commission.
2. Revocation of Offers
One of the key legal aspects of unilateral contracts is the right to revoke an offer before the requested action is completed. For example, if a company offers a bonus for meeting a sales target but later withdraws the offer before any employee qualifies, the revocation is valid. However, if an employee has already met the sales target before the revocation, the company must honor the contract.
3. Proof of Performance
For a unilateral contract to be enforced, there must be clear proof that the required action was completed. This is particularly relevant in cases like reward offers or commission-based agreements. If a dispute arises, the party claiming the reward or compensation must demonstrate that they fulfilled the contract terms.
4. Ambiguity and Interpretation Issues
Unilateral contracts can sometimes lead to disputes over unclear terms or misinterpretations of the offer. Courts often analyze the wording of the contract to determine whether it was specific and whether the offeree had a fair opportunity to accept by performance. Clearly stating the conditions and deadlines in writing helps avoid legal complications.
5. Applicability in Different Jurisdictions
Different countries and states may have varying laws regarding unilateral contracts. In some cases, courts may treat them similarly to bilateral contracts if elements like implied obligations exist. For example, in certain business agreements, repeated transactions between two parties might establish mutual expectations, even in a seemingly unilateral arrangement.
Understanding these legal considerations ensures that unilateral contracts are used effectively and fairly while minimizing risks for both parties.
Advantages and Disadvantages of Unilateral Contracts
Unilateral contracts offer unique benefits and challenges depending on the situation in which they are used. While they provide flexibility and clarity for certain agreements, they can also introduce risks if not carefully structured.
Advantages of Unilateral Contracts
1. Encourages Specific Actions Without Obligation: The offeree is not required to act, giving them complete control over whether they want to accept the offer. This makes unilateral contracts useful in situations where participation is voluntary, such as reward offers or commission-based work.
2. Simplicity in Contract Formation: Since only one party makes a promise, unilateral contracts are often easier to create and require fewer negotiations compared to bilateral contracts.
3. Effective for Public Offers: They work well for offers that are made to a broad audience, such as sweepstakes, promotions, and loyalty programs, where multiple people may choose to perform the required action.
4. Reduces Commitment Until Performance: The offeror is only bound to their promise if the requested action is completed. This minimizes risk compared to bilateral contracts, where both parties are legally committed from the start.
Disadvantages of Unilateral Contracts
1. Lack of Certainty for the Offeror: Since the offeree is not obligated to act, the offeror has no guarantee that the action will be performed. For example, a company offering a referral bonus cannot predict how many people will actually bring in referrals.
2. Potential for Ambiguity and Legal Disputes: If the contract terms are not clearly defined, disputes may arise over whether the required action was fully performed. This is particularly relevant for commissions and bonuses, where eligibility criteria must be explicitly outlined.
3. Risk of Offer Revocation: The offeror can withdraw the contract before performance begins, which may create uncertainty for the offeree. However, if partial performance has already started, revocation may not be legally valid.
4. Proof of Performance Required: In cases like reward claims or commission-based payments, the offeree must provide sufficient evidence that they have completed the required action, which can sometimes be difficult or contested.
Conclusion
Unilateral contracts play a significant role in various industries, from reward offers and service-based incentives to real estate transactions and business agreements. Their flexibility and simplicity make them useful in situations where one party seeks an action rather than a mutual commitment. However, careful drafting and clear terms are essential to avoid ambiguity, disputes, and revocation issues.
With Certinal’s enterprise-grade eSignature and consent management solution, businesses can digitally execute contracts faster, with built-in compliance, security, and automation. Whether you’re managing real estate agreements, incentive-based contracts, or commission approvals, Certinal ensures that every agreement is secure, legally binding, and executed efficiently.
Ready to streamline your contract processes?
Request a demo today to see how Certinal can help your organization sign and manage contracts with ease.
Frequently Asked Questions (FAQs)
1. Can a unilateral contract be revoked after partial performance has begun?
In most cases, once the offeree has started performing the requested action, the offeror cannot revoke the contract. Courts may enforce the contract to prevent unfair withdrawal, especially if the offeree has made significant efforts toward completion.
2. What happens if multiple people complete the performance in a unilateral contract?
If multiple individuals fulfill the conditions of a unilateral contract, the offeror is generally required to reward the first person who completes the task. However, in cases where the offer was extended to multiple recipients, the offeror must follow the specific terms outlined in the contract.
3. Are verbal unilateral contracts legally enforceable?
Yes, verbal unilateral contracts can be enforceable, but proving the terms and conditions in court may be challenging. Written contracts provide clarity and reduce the risk of disputes regarding offer terms, performance, and obligations.
4. Can a unilateral contract exist between businesses rather than individuals?
Yes, businesses frequently use unilateral contracts, such as service bonuses, referral incentives, and performance-based commission structures. These agreements create legal obligations once the specified action is completed.
5. How does a court determine if a unilateral contract is valid?
Courts assess the clarity of the offer, the specificity of the requested action, and whether the offeree had a fair chance to accept by performance. If the terms are vague or lack essential details, the contract may not be enforceable.


