We are trying to determine the best way to document an artifact that is not applicable for a study. For example, if a study is open-label, we will never file documents related to blinding, etc. Our current eTMF file structure is configured to display all artifacts, regardless if the artifact is applicable. Should we document a Note to File to indicate if a document is not applicable, and therefore, the artifact will remain empty? What is the best way to handle this so an auditor does not think the document is missing?