The matter arose from a dispute between the executors and heirs of identical twins, Peter and Alfred (Lef) Christelis, who conducted all their business and held their assets jointly in what was alleged to be a universal partnership. After Peter’s death in February 2003, his heirs alleged that Lef, before his own death in 2007, removed, concealed or disposed of jointly owned movable assets, including diamonds, Kruger Rands, negotiable certificates of deposit and jewellery, which were said to be unaccounted for. The appellants instituted action against Lef’s estate based on the actio (condictio) furtiva, claiming that Lef unlawfully appropriated or disposed of these assets with knowledge of Peter’s estate’s claim. The trial court dismissed the claim, finding that the appellants failed to prove the existence of the alleged assets at the time of Peter’s death or that Lef had disposed of them in circumstances amounting to theft or furtum usus. The appellants appealed to the Supreme Court of Appeal.