If you wish to offer standard form contracts, you should not include clauses considered abusive. These could include conditions: as long as a contract meets the above conditions, it is applicable in court, which means that a court may compel a non-compliant party to comply with the terms of the contract. In general, a contract should not be written and, in many cases, an oral agreement with all of the above is a valid and enforceable contract. An exception arises when advertising makes a unilateral promise, such as offering a reward, as decided in the famous case of Carlill v Carbolic Smoke Ball Co, in 19th century England. The company, a pharmaceutical manufacturer, proposed a smokeball that, if it sniffed “three times a day for two weeks,” would prevent users from catching the “flu.” If the smokeball does not prevent “the flu, the company promised that it would pay $100 to the user, adding that they deposited “$1000 in the Alliance bank to show our sincerity in the file.” When Ms. Carlill complained about the money, the company argued that the complaint should not be considered a serious and legally binding offer; instead, it was a “simple mess”; However, the Court of Appeal found that Carbolic had made a serious offer to a reasonable man and found that the reward was a contractual undertaking. Finally, a modern concern that has increased in contract law is the increasing use of a particular type of contract called “contract contracts” or “formal contracts. This type of contract may be beneficial to some parties, due to the convenience and ability of the strong party in a case to force the terms of the contract to a weaker party. For example, mortgage contracts, leases, online sales or notification contracts, etc. In some cases, the courts consider these membership contracts with particular scrutiny because of the possibility of unequal bargaining power, injustice and unacceptable. Each contracting party must be a “competent person” with the force of law. The parties may be individuals (“individuals”) or legal entities (“companies”). An agreement is reached if an “offer” is adopted.
The parties must intend to be legally connected; and to be valid, the agreement must have both a correct “form” and a legitimate purpose. In England (and in jurisdictions using the principles of the English treaty), the parties must also exchange “counterparties” to create a “reciprocity of engagement,” as in Simpkins/Country.  Most of the principles of the Common Law of Contracts are defined in the Restatement of the Law Second, Contracts, published by the American Law Institute. The Single Code of Trade, the original articles of which have been adopted in almost all states, is a law that governs important categories of contracts.