This is an important expectation to set at the planning stages of any design project. In most cases, the production files belong to the production designer and they are not sent anywhere else. In some cases, copies of working files can be negotiated at an additional cost. There are additional steps and file preparation required if those files need to be sent as a deliverable.
More importantly, the files represent value in the iterative designs that can be created from them. We want to respect the creative property of the person who has actually produced the work. If the files are to be included as a project deliverable, this needs to be outlined at the beginning of the project.
