04/16/2026
One missing signature can invalidate a drug test.
Under DOT regulations (49 CFR Part 40), every step of the collection process matters—from identity verification to proper Chain of Custody documentation.
I’ve seen companies have to redo entire tests because of simple errors:
Missing collector signatures
Incorrect temperature documentation
Improper specimen handling
These aren’t small mistakes—they create delays, liability, and compliance issues.
At Vital Testing Solutions, our focus is simple:
Do it right the first time.