Contract Basics: Formation and Requirements
Ever wonder what makes a promise legally binding? A contract is a legally enforceable agreement containing one or more promises. For a valid contract to exist, you need four key elements:
- Offer - A willingness to enter into a bargain that invites another person's agreement
- Acceptance - An assent to the offer, typically through a promise or performance
- Intent - Both parties must intend to be legally bound
- Consideration - Something of value exchanged between parties
The first two elements (offer and acceptance) create what's called mutual assent or a "meeting of the minds." Without this, no contract exists!
There are two main contract types you'll encounter. In a bilateral contract, both parties make promises (like "I'll mow your lawn if you pay me 100 to whoever finds my lost dog").
Not all offers lead to contracts. Invalid offers include jokes, preliminary negotiations, and most advertisements. Once a valid offer exists, it can be terminated through:
- Rejection or counteroffer
- Lapse of time
- Death or incapacity
- Revocation (withdrawal by the offeror)
Remember this! Some offers can't be revoked, including option contracts (where the offeror promises to keep an offer open in exchange for consideration) and firm offers (written promises by merchants to keep offers open for a limited time).
For acceptance to be valid, it must follow the mirror image rule - your acceptance must match the offer's exact terms. Any changes create a counteroffer instead. The moment of acceptance varies but typically occurs when it leaves the acceptor's possession (like dropping a letter in a mailbox).










