Rückabwicklung und Selbstbestimmung

What is the substantive basis underlying the German Civil Code's procedure for unwinding contracts or performance without a legal ground? Philipp Schlüter casts new light on the classic dispute about unification and separation theory as encountered in the law of unjustified enrichment. In so doing, he also makes a number of findings regarding neuralgic »triangular cases« as well as the »Saldotheorie« problem.