The project aims to examine the limits of contractual and non-contractual liability. The problem of competing claims has been considered by the Supreme Court in recent years. The consequence of this practice is an intertwining of two traditionally separate areas of law. This is a legal challenge and the subject is highly topical. The question of who in a contractual chain can be held liable and under what conditions is a challenge to the system of property law that was previously so self-evident. New tools are needed to analyze which rules are most appropriate today, not least to deal with increasing globalization and more complex contractual chains. For the regulation of contractual and non-contractual liability to work in today's society, these issues need to be further explored.