Provenance, the ownership history of an artifact or work of art, has become one of the primary mechanisms for determining the legal status and authenticity of a cultural object. Professional associations, including museum

organizations, have adopted the “1970 standard” as a means to prevent the acquisition of an ancient object from promoting the looting of archaeological sites, which is driven by the economic gains realized through the international

market. The Association of Art Museum Directors (AAMD), one of the museum world’s most influential professional organizations, requires its members to list the ancient artworks and artifacts that they have acquired after 2008

that do not conform to the 1970 standard in an online object registry. The study presented here of the AAMD’s Object Registry for New Acquisitions of Archaeological Material and Works of Ancient Art analyzes the extent to which

AAMD member museums do not comply with the 1970 standard and, perhaps of greater significance, the weaknesses in the provenance information on which they rely in acquiring such works. I argue that systematic recurrences of inadequate provenance certitude are symptomatic of the larger problem of methodology and standards of evidence in claiming documented provenance. A museum’s acceptance of possibly unverifiable provenance documentation and, therefore, its acquisition of an object that may have been recently looted, in turn, impose a negative externality on society through the loss of information about our past caused by the looting of archaeological sites.