The abstract system of title transfer (German: Abstraktionsprinzip) is a legal term in German law relating to the law of obligations (Schuldrecht) and property law (Sachenrecht). Although no express reference to it is made in the German Civil Code (BGB), the concept of separating a personal undertaking to pay or exchange goods or legal rights (e.g. through contract) from the conveyance of title to those goods or legal rights (e.g. through a deed or land registration) is fundamental to German private law (as well as Dutch law, South African law, and possibly Common law).