If the other party had no reason to know the fragility, a court can enforce the agreement to the extent necessary to avoid injustice. For example, if a person apparently competent (but incompetent) contracts to buy a car, they can cancel the contract. However, if the car has lost value while owned by the incompetent party, a court may require a refund of the current value of the car.  CIVIL LAW requires a person to be legally competent to enter into a contract, sign a will or take out another type of legal undertaking. A person may be found incompetent because of his or her age or mental state. When a party does not understand the nature and consequences of the contract when the contract was created, it is considered incapable of working mentally. People who have been convicted as incompetent by a court and appointed by a legal guardian should be distinguished from those who are mentally incompetent but who have not been convicted in this way. A person declared incompetent in a court proceeding is not entitled to enter into a contract with another. Such a person is not in a position to accept a contract because the Tribunal found that it did not understand the obligations and effects of a contract. A contract entered into by such a person is non-agreeable and without legal effect.
If there has been no assessment of mental incompetence, a contract entered into by an individual unable to act mentally is VOIDABLE by them. This means that the person can legally cancel the contract, making it unenforceable. However, an unsigned contract may be ratified by the incompetent person if the person regains his contractual capacity. An agreement on the execution of an illegal act is an example of non-agreement. For example, a contract between dealers and buyers is a non-contract, simply because the terms of the contract are illegal. In such a case, neither party can take legal action to enforce the contract. An inconclusive contract is invalid from the outset, while a cancelled contract may be cancelled by one or all parties. A cancelled contract is not invalidated by initio, but becomes invalidated later due to certain changes in the condition. In summary, the contracting parties do not have discretion in a nullity contract. Contracting parties are not entitled to enforce a nullity contract.  Contract law also provides for the cancellation of a contract entered into by a person intoxicated, the person being incompetent at the time of the creation of the contract.
While minors can invalidate their agreements with adults, adults do not have the same opportunities. That is why, for example, credit card companies, however desperate they may be for customers, will not issue credit cards to minors. It is clear from the discussion above that only those responsible for the treaty are a great healthy spirit and are not disqualified by law. A person who is diagnosed with a person with a mental illness that prevents them from managing their own affairs may be found mentally incompetent by a court. When a person is found to be incompetent, a guardian is appointed to handle the person`s property and personal affairs. If a minor wants to deny a contract by obtaining a majority, 18 in most countries, he must do so within a reasonable time after reaching the age of majority. For example, the return of a car purchased two weeks after the 18th turn was fast enough to qualify as disaffirmation.  The minor had the right to criticize himself when the car had lost its value, which shows that the parties enter into contracts with minors at their own risk. In India, the agreement with a minor is invalid of initio means cancelled from departure. In Mohri Bibee v. Dhurmodas Ghose, the Privy Council held that “the law requires all contracting parties to be competent,” and the law provides, in particular in Section 10, that a person who is incapacitated because of his childhood does not have a contract.