A **bilateral offer** and a **unilateral offer** differ primarily in the way agreements are formed and the obligations they impose on the involved parties. Here’s a detailed breakdown:
### 1. **Bilateral Offer:**
- **Definition:** A bilateral offer is one where both parties make promises to each other. In this case, there are mutual obligations on both sides. Each party is both a promisor and a promisee.
- **Example:** In a contract for the sale of goods, the seller promises to deliver the goods, and the buyer promises to pay the agreed price. Both parties are bound to perform their obligations.
- **Formation:** It is formed through mutual consent when both parties agree to be bound by the terms of the contract.
- **Obligation:** Once the offer is accepted, both parties have legal obligations to fulfill their promises.
### 2. **Unilateral Offer:**
- **Definition:** A unilateral offer is an offer made by one party (the offeror) that requires performance from the other party (the offeree) rather than a promise. The offeror is only bound when the offeree performs the requested action.
- **Example:** A reward for finding a lost pet is a unilateral offer. The offeror (person offering the reward) is only obligated to pay if someone finds the pet and returns it.
- **Formation:** The contract is formed only when the offeree performs the action requested in the offer, not merely by agreeing to the terms.
- **Obligation:** The obligation arises solely on the offeror's side, and only when the specified action is performed by the offeree.
### Key Differences:
- **Nature of Obligation:** In a bilateral offer, both parties have obligations, while in a unilateral offer, only the offeror has an obligation once the required act is performed.
- **Formation:** Bilateral contracts are formed by the exchange of promises, whereas unilateral contracts are formed by the performance of an action.
- **Typical Use:** Bilateral contracts are common in everyday transactions like sales, services, or employment agreements. Unilateral contracts are often used in rewards, contests, or public offers.
This distinction is important in contract law, as it determines when the contract becomes binding and the obligations of each party.