In its literal meaning, fuduli refers to a person who interferes in matters that are none of his business. Technically, fuduli is one who disposes of someone’s rights and obligations without prior legal permission or authorization. In this sense, a fuduli could not be a guardian (walii), principal (muwakkel), or agent (wakeel) in a contract, as all these people must have an established right or a prior authorization to dispose. The behavior of a fuduli is subject to varying juristic rulings, depending on the transaction itself (i.e., sale, lease, etc).

Fuduli is an Arabic word that translates as interloper.