An internal text is forwarded to the customer before the planned check. I propose to distinguish work material and authorized version through a clear process.
In the example, the document is identified for use and responsible, without relying solely on the file name. Protection does not have to be a decorative formula.
You need to know who can spread and when. An organization that generates a lot of material must prevent the ease of production from making unverified content more likely to be adopted.