For example, if a party wishes to accede to an existing agreement without clear consideration, it would conclude an instrument of accession: docpro.com/doc379/deed-of-adherence-to-agreement-general section 10 sets out the conditions necessary for the validity of a contract. In contract law, „capacity“ refers to a person`s presumed ability to understand the terms, obligations and consequences of signing a contract. Some parties, such as minors, people suffering from diseases such as dementia and people under the influence of alcohol or drugs, are probably not able to sign a binding contract. If we say that the person should not be disqualified by law, it means that some laws prevent him from entering into a contract, as in the case of an insolvent person. People who cannot read the language in which the contract is written would gain capacity if they obtained a translated copy of the contract. In general, a person must understand the meaning and effect of the words that make up the contract. A contract may be cancelled in litigation if one party has taken advantage of the other party`s incapacity. A written contract, even a simple one, drafted by both parties without lawyers, is still a good idea, but it is possible to prove a contract between the parties, even if nothing is written. . . .