With increasing sustainability goals, the European Commission has stated the need for transitioning from a linear economy towards a circular economy. This is planned to be implemented by 2050, with new regulations and requirements to be released continuously until then. One of the major requirements is the in- troduction of Digital Products Passports (DPP) as a way of tracking information related to specific products. This paper investigates the potential use cases that DPPs could have, different information requirements, and possibilities for a successful implementation. Further, since DPPs are a relativity new topic, the paper will analyze the current state of the art. A qualitative study based on a scoping review, document analysis, and semi- structured interviews with representatives working in the built environment were used. The findings of the study indicate that the introduction of DPPs can facilitate information flows in the built environment and serve as an effective tool for promoting circularity within the sector. Issues occur due to the current lack of standard- ization and clear definitions, causing confusion about the scope and objectives of DPPs. Regarding information requirements, the data infrastructure instead of specific requirements, has been identified as one of the most important aspects. For this, Product Data Templates (PDT) and linked data were proposed as a solution for presenting and structuring information in DPPs.