As with all social activities, assessment also need to follow certain social rules of global organization. Kraft and Dausendschön-Gay use the term " contract " to describe the overall organizational mechanism of social interaction. It does not only mean responsibility and obligation, but also represents the entire social contract. For example, in a language class there is a learning contract or a pedagogical contract which falls under a set of rules that govern educational behavior. There is even didactic contract that is more in the local fulfillment and negotiated actions. The question naturally arises: is there also a kind of " contract " that regulates the global and local organization on the interactions between the participants, on the coordination of their actions in order to achieve a common goal, on the object and on the modalities of the interaction in oral assessment ? In order to answer this question, we collected some oral assessment video corpus of French beginners level A2 according to CEFR, which cover on four situations: monologue, role-playing between candidates without presence of the class, role-playing between candidates in front of the class, role-playing between candidate and evaluator. Through multimodal transcription and interactional analysis, we deconstruct the assessment into several steps. The evaluator establishes instructions for an assessment task in different ways, specifying the form, clarifying the form of assessment, the content of the assessment, and the assessment requirements that the student must strictly follow. During the assessment, candidate need to mobilize all of his competences to demonstrate what they have in a particular language. Finally, candidate waits for the result or assessment given by the evaluator. There are the so-called " evaluation contract ".