Several international mass claims programmes have recently been established to process individual claims arising from armed conflicts. These entities possess specific institutional and structural features allowing for an effective and efficient resolution of claims. Moreover, violation of international law protecting property during war gives rise to inter-State and individual reparation, mostly partial, for which monetary compensation is more frequent than return of property. These programmes have also developed specific procedures to handle the administration of evidence and new techniques to decide all of the claims within a reasonable period of time. This 2-volume set reviews modern-day mass claims practice. Volume I shows how new mass claims programmes have built upon traditional dispute resolution mechanisms, and also examines the substantive law rules protecting property rights. Volume II focuses on the administration of evidence and the techniques developed to decide mass claims, including the use of statistical sampling.