The author examines the practical effect of the combined influence of customary and introduced common laws on the law of contract operating in the South Pacific – particularly the twelve island countries within the region with membership of the “University of the South Pacific” (USP). Published in Amicus Curiae - Journal of the Institute of Advanced Legal Studies and its Society for Advanced Legal Studies. The Journal is produced by the Society for Advanced Legal Studies at the Institute of Advanced Legal Studies, University of London.