The third party investor contract is an agreement by which a third party (banking institution, energy service provider) undertakes to develop and maintain an energy production project for the benefit of its contracting partner for a fee. However, this practice is regulated from a regulatory point of view, in particular, in order to determine on which party the status of producer within the meaning of applicable legislation is based and whether or not energy is supplied. These qualifications are important because they are a source of various obligations. Particular attention should therefore be paid to the drafting of these conventions.