Abstract
Approbation is a mental elegance process aiming at exempting a partial matter from comprehensive judgment or a public rule justified by a favorable interest, applying this concept raised discussions and arguments among fundamental scientists of Islamic jurisprudence. Some would consider it as a reliable mental dependent source. Others would consider it as a not serious source and an excuse to evade from the rules of the legitimate texts, Here, is an attempt to authenticate this legitimate evidence and expose its disciplines and limitations, Also, it shows samples of its implementations in the Islamic jurisprudence, and it focuses on its strong relationship, particularly, the validity of jurisdiction in interference to amend the contractual obligations. This aims at existing public rules governing contracts’ rules, the most important being the rule of (a contract is the law of the contracting parties).