Identification on pain pills is required by the Food and Drug Administration (FDA). According to Pharmer.org "All FDA-approved pharmaceuticals must have a unique imprint. An imprint is any marking on the pill, such as an engraved logo, numbers and/or letters or a raised or debossed symbol." However, there are generic manufacturers that still allow some of their pills to be unmarked, despite the law. There are ways to identify these generic pills even without an imprint identification marking.