A combination of an on-site drug testing protocol and effective secure evidentiary procedure to ensure veracity and chain of possession for prosecution purposes is provided. Additionally, the procedural method includes a combined secure adhesive attachment to a drug test that serves as both an information collector and preservation device. The overall method thus includes steps of having a test subject apply oral fluids to a test device, covering and sealing the device, and taking real-time information and photographs into a time-stamp system and supplying such information and photographs instantly to a secure database. The oral fluids are thus preserved by the information-providing seal under a proper cover component to ensure DNA material is permitted for authenticity purposes as well. The overall protocol thus accords an all-encompassing evidentiary chain model at a highly trustworthy level if needed in a courtroom setting.