From March–June 2014, the AflaSTOP project sought to acquire 53 tons of grain contaminated with aflatoxin. This grain was sourced from smallholder farmers in Meru and Makeuni districts of Kenya and provided the raw materials for AflaSTOP’s off-farm, controlled testing of the effectiveness of a variety of hermetic storage devices in stopping the growth of aflatoxin in maize. This report summarizes findings from that acquisition process, including the experience identifying and interacting with farmers, the process used to test bags “on-site”, and data on amounts sourced, contamination level, and prevalence of contamination in bags tested.