Abstract: A package and a process is provided for packaging a perishable product and providing a tamperproof visible date code on the resultant package. The process includes the steps of providing form, fill and seal package making process equipment; and providing to that equipment a supply of plastic film in strip form having opposed first and second lateral edges and a thermally sealable side. A date code is printed adjacent to the first edge on the sealable side. The film is then conveyed through a folding device to cause the printed date code to be overlaid by the opposite or second lateral edge of the plastic film. The lateral edges of the film are then thermally sealed together with the second edge overlying the imprinted area thereby forming a tube. The tube is then formed into a series of individual packages which are filled with the perishable product.