September and that the necessary parties have not signed the contract, it is not valid. An executed agreement is a signed document drawn up between the persons necessary for entry into force.3 min read The document or contract may be concluded by two or more persons, one person and one entity or two or more entities. Contracts generally define a party`s obligations with respect to goods or services vis-à-vis another party and are effective only when each party has signed the agreement. For some contracts, signatures must be attested. Ken Adams of Koncision argues that, in those circumstances, it is clearer to include the date of the contract in the opening clause and to designate that date as `the date of that agreement`. For example, although it is not a technical refund, ratification is often used in the business context to allow for the approval of a measure by nunc pro tunc. When a board of directors ratifies a contract or other action previously approved by senior management, or even by someone who is not empowered to take further action, the effect is similar to that of retroactivation. The company agrees to be bound by an act before the effective authorization date. In many cases, the date of performance of a contract is before the effective date. .