Drug testing is a major requirement in the process of employment, licensing, and admission to institutions.  When a sample is collected, chain of custody is the process of accountability; of knowing who donated the specimen, and who had possession of the specimen.  The integrity of the sample is maintained by documenting that proper protocol of custody and control is followed during each step of the procedure:  collection, transfer, analysis, reporting of results, and sample storage or disposal.


Main Chain of Custody Page