Abstract: A linerless security bag comprising a front side section and a back side section, the front and back side sections being attached to one another along at least three of four peripheral edges, the fourth peripheral edge of the back side section and front side section being unattached to one another, the front side section having a flap, the flap having impregnated thereupon an adhesive strip and a non-permanently sticking section, the flap being folded over on itself such that prior to use of the security bag the non-permanently sticking section is in contact with the adhesive strip section, the adhesive strip section strip and the non-permanently sticking section being capable of separation, the flap then being foldable such that it blocks access to an interior compartment of the security bag, the adhesive strip section contacting and permanently adhering to the front side section.