← Back to articles
Documentation
The chain-of-custody gap most labs don’t know they have.
Swiftline Editorial · January 2026 · 5 min read
When an auditor asks to see your chain-of-custody documentation for the last 90 days, what happens next? For most facilities using general couriers, the answer involves a phone call, a spreadsheet, and a lot of hoping. For some, it involves explaining why the documentation exists in fragments across three different systems, none of which were designed for this purpose.
The chain-of-custody gap is not usually the result of negligence. It is the result of a process that was never designed to produce documentation — and that no one ever seriously pressure-tested until the audit happened.
What the gap actually looks like
Most facilities are confident they have chain-of-custody documentation. They have delivery receipts. They have booking confirmations. They have, perhaps, a temperature logger that the courier drops off at the end of a run, or a printed report emailed some days later.
What they typically do not have:
• A document signed at the point of collection, by the person who handed over the specimen, confirming the identity of the specimen, the condition of the transport unit, and the time of transfer
• A document signed at the point of delivery, by the person who received the specimen, confirming the same
• A continuous temperature log for the duration of transit — not a summary, not a minimum and maximum, but a time-stamped record of every reading
• A written incident report for any deviation, regardless of whether that deviation fell within “acceptable” parameters
A delivery receipt proves that a package arrived. It does not prove what condition it was in at the moment of transfer, who handled it, or what the thermal environment was during transit. These are not the same document.
The audit scenario nobody wants
Consider a scenario that plays out more often than most facilities admit: a patient experiences an unexpected outcome. The embryo did not develop as expected. Fertilisation failed. The outcome cannot be explained by anything that happened inside the clinic.
The question that follows is: what happened during transport?
If the answer to that question is a temperature logger summary showing a range of 2–8°C, a delivery receipt signed by a receptionist, and a verbal assurance from a courier that “everything was fine” — that is not documentation. That is the absence of documentation dressed up to look like something.
Why general couriers cannot close this gap
The chain-of-custody gap exists because general courier services — even good ones — are designed around the movement of packages, not the documentation of biological specimen custody. Their processes, their technology, and their staff are optimised for speed and scale, not for the kind of granular documentation that regulated healthcare requires.
This is not a criticism. It is a description of what these services are built to do. The problem is when facilities treat them as interchangeable with a specialist healthcare logistics operator, because the two things look similar from the outside. A vehicle arrives. A package is transferred. Someone signs something.
What happens between those moments — and what is recorded about it — is entirely different.
What closing the gap actually requires
Closing the chain-of-custody gap requires three things that cannot be retrofitted onto a general courier relationship:
Chain-of-custody forms that are specific to healthcare specimen transport — capturing specimen identity, transport unit condition, temperature at handover, and signatures at both ends. Not a generic delivery receipt with a field for “contents.”
Drivers who understand why the documentation exists and what happens if it is incomplete. Who know that a signature is not a formality but a legal record of custody transfer. Who will refuse to accept a specimen if the transport conditions are not met, and who will document the refusal.
A temperature summary tells you the range. A continuous log tells you when, for how long, and at what rate. These are different pieces of information. In the event of a disputed outcome, the continuous log is the only document that can definitively characterise what the specimen experienced.
The question to ask your current provider: If an auditor asked for the complete documentation package for every specimen transfer in the last 90 days — dual-signature COC forms, continuous temperature logs, and incident reports — how long would it take to produce them, and how complete would they be?
If the answer is anything other than “immediately” and “complete,” the gap is real. It may never matter. But if it ever does, the moment it matters is not when you want to be discovering it for the first time.
Ready to talk
Documentation that holds up when it matters.
Every Swiftline transfer includes a signed chain-of-custody form, continuous temperature log, and written incident report. No exceptions.
Request Transport