As a client, it is naturally your right to know the providers; here is what a client represents.
The performing party client is a person or organization. They make the entrepreneurial decision to plan and execute a project and assume the duties and rights arising from this decision. According to Art. 73 of the Bavarian Building Code, cited by Schub [3.7], the client is "someone who prepares or executes a building structure on their own responsibility, or has it prepared or executed."
The client thus defines the building task in terms of scope, quality, time, and costs, acquires the land and financial resources, commissions planners, companies, and suppliers, and fulfills the requirements for a largely smooth construction process by obtaining the necessary permits and making timely decisions in the various planning and construction phases.
Furthermore, they coordinate the activities of all parties involved in the construction and, after the planning is completed, which takes place in the individual partial steps through feedback or control loops, supervise the execution regarding quality, time, and costs. From the perspective of efficient construction execution, they have the special responsibility to ensure that all construction services are carefully planned and tendered, that the companies receive the necessary execution documents (plans) on time and in full, and that the necessary decisions on their part are made promptly.
This presupposes knowledge of the providers.
best regards Husmann Sachverständigenbüro