Öz
Aestimatum is the transaction that serves to transfer the merchandise a predetermined value of to a third person for sale. The person who takes over the good is obliged to pay the pre-agreed price if he sells the good; if he cannot sell the goods, he must return the good. This contract, which is called aestimatum in Roman law, is commonly referred to “consignment sale” contract in Turkish doctrine. Aestimatum is not a contract regulated in modern Turkish law. This contract is among the innominate contracts. Aestimatum, unlike Turkish law, is a specially arranged contract in Roman Law. The aestimatum is arranged in the texts to the title of “De Aestimatoria” in D.19.3 and in the texts devoted to the title of “De Praescriptis Verbis” in D.19.5 in the classical legal sources. The legal nature of the institution of aestimatum is also very controversial. In today's law, institutions such as commercial representation and mobile merchant officer are separated from each other and their functions are more or less differentiated. However, in Rome, these institutions were not strictly separated from each other. As it is argued in the doctrine, the gap in modern commercial law regarding institutions such as commercial agency (Codes des Obligations Turkish article 547), brokerage (COT art.532), agent mercantile (COT art.448 et ss.) and has been filled by the aestimatum.