Once you make your first contract, it’s quick and easy to change the details for future customers or clients. The problem with using these sample contracts is that they may be overly complicated, and they may not conform to the specific requirements in your state. If you do want to use a sample contract you find online, we strongly recommend For a contract to be valid, it must have four key elements: agreement, capacity, consideration, and intention. Agreement. Offer. An agreement happens when an offer is made by 1 party (eg an offer of employment) to the other, and that offer is accepted.An offer is a statement of terms which the person making the offer is prepared to be contractually bound to. By contrast, contracts for the sale of goods are governed by your state's version of the Uniform Commercial Code (U.C.C.). Modifying a Contract Before Signing It. To be legally binding, a contract must be agreed to by all interested parties. For example, imagine you want to buy a car, but you do not like the price offered by the dealer.