The term ‘chain of custody’ appears throughout cannabis compliance documentation, but its practical meaning — and why it has such significant implications for licensed Minnesota operators — is worth understanding thoroughly. For the complete guide, read The Complete Guide to Cannabis Testing Transport in Minnesota.
What Chain of Custody Means
Chain of custody is the documented, unbroken record of every person or entity that had possession or control of a sample from the moment it was collected to the moment it was analyzed. The chain is only as strong as its weakest link. If any handoff is undocumented — if a sample passes from one person to another without a signed timestamp, or if a transport vehicle makes an unaccounted stop — the chain is broken.
Why a Broken Chain of Custody Is a Problem
Regulatory audit. If the OCM audits your facility and reviews your testing records, a test result with a broken or incomplete chain of custody is a finding — it raises the question of whether the sample was properly handled between your facility and the lab.
Product liability. In the event of a consumer complaint or harm claim, the chain of custody for your test samples is part of the evidentiary record demonstrating your product was properly tested and compliant at the time of sale.
Failed test results. If a batch fails testing, the chain of custody is reviewed as part of investigating why. A broken chain creates ambiguity that does not help your situation regardless of which answer is true.
The Elements of a Complete Chain of Custody
- Sample collection documentation — who collected it, when, from which batch, what quantity, how it was sealed
- Metrc transfer manifest — identifying the sample, originating facility, testing lab destination, and transport authorization
- Pickup handoff documentation — signed by both your facility representative and the transport team, timestamped
- Transport record — GPS logs and vehicle records for the duration of transit
- Lab intake documentation — signed confirmation of sample receipt, noting condition and confirming sample identifiers match the manifest
- Lab internal chain of custody — from intake through analysis
How Transport Method Affects Chain of Custody
A licensed cannabis transport company with proper procedures provides a complete, documented transport record for every sample run — GPS tracking, driver logs, signed pickups and deliveries, and Metrc manifest closure. This is the kind of chain-of-custody documentation that withstands regulatory scrutiny.
An informal transport method — an employee driving samples in a personal vehicle, or using an unlicensed carrier — produces no transport record that meets the regulatory standard. The chain is broken at the transport step regardless of how careful everyone is being.
Going Green Transport maintains complete chain-of-custody documentation on every sample run. We serve operators in Hibbing, East Grand Forks, Owatonna, and across Minnesota. View all service areas on our Minnesota cannabis transport locations page