Quote Originally Posted by volcomstoner
Also the person took a different vial and filled it with my sample an had me initial it. What's that all about?
That is known as a "split-sample collection". No big deal. Sample is split into vial A and vial B. Vial A gets tested while vial B is put into storage. If vial A tests positive for a particular drug(s), and the donor decides to mount a challenge to the results, then vial B gets tested.