To prevent adulteration, collection of a forensic urine sample should occur under supervision. We recommend the collection in a urine cup from which a few mL are transferred into a urine Monovette® from the company Sarstedt. The small volume of the sample allows an easy transport in a covering box (security collection tube) without risk of leakage. Other collection systems are also adequate. If transport of the urine sample to the laboratory is delayed, the sample should be kept in the refrigerator or can even be frozen.