This document is a proposal to create a framework for communication between the entity requesting information regarding carbon footprint calculations (e.g., investor, consultant) and the supplier of this information (e.g., contractor, subcontractor, consultant). Market observation indicates that different entities (investors, banks) currently expect different scopes of carbon footprint calculations. Clear communication of information requirements to the entity with the best knowledge of materials and quantities, i.e., the contractor, is a challenge. This document aims to streamline this process by providing standardized forms and specifying the scope of expected information, for example, in contracts. We believe that this will lead to standardization of the exchange of information on materials and quantities needed for reliable carbon footprint calculations, and ultimately contribute to the development and popularization of comparable emission benchmarks in the market.