What Should You Do If a Trailer Seal Is Broken, Missing, or Does Not Match the Paperwork?

A trailer seal that is broken, missing, or carrying the wrong number is a security exception, not a paperwork error. Goods-in teams should stop the unload, photograph the seal and doors before anything is touched, record the seal number found against the number on the paperwork, escalate to a named decision-maker, then decide whether to reject, quarantine, or unload under control.

What Counts as a Trailer Seal Discrepancy?

A trailer seal discrepancy is any difference between the seal on the vehicle and the seal recorded on the transport paperwork. It takes three forms, and the one teams treat as least serious is often the most serious.

Discrepancy	What goods-in finds	What it indicates
Broken seal	Seal cut, snapped, or hanging loose	Access in transit, or a lawful customs inspection
Missing seal	No seal on a load the paperwork says was sealed	Never applied at dispatch, or removed in transit
Number mismatch	Seal intact, but the number differs	Possible substitution: opened and resealed

An intact seal carrying the wrong number is the strongest tampering signal of the three, because a serialised seal cannot be refitted bearing its original number. Seal verification is a security control, separate from the quality checks covered by an incoming inspection.

How Should a Goods-In Team Check a Trailer Seal Before Unloading?

Goods-in teams should check a trailer seal using the View, Verify, Twist and Tug method, with a witness, before the seal is cut. US Customs and Border Protection prescribes VVTT for CTPAT members, and the four steps work on any sealed vehicle:

• View the seal body and door locking hardware for scratches, tool marks, or residue.
• Verify the seal number against the paperwork, digit by digit.
• Twist the seal to check whether any component unscrews or moves.
• Tug the seal firmly to confirm it cannot be pulled free.

The receiver breaks the seal, never the driver, and initials the seal number on the paperwork before cutting anything. Each sealed opening is checked and recorded separately. Seals on customs-controlled movements must meet ISO 17712, and a high security seal carries the letter H stamped on its body.

How Do You Tell Deliberate Tampering From Transit Damage?

Tampering usually leaves marks on the locking hardware, while transit damage leaves marks only on the seal body. A seal that looks intact but pulls apart by hand has already been cut and reseated. Photograph the door hardware as well as the seal, because the hardware is where the evidence sits.

What Should You Do If a Trailer Arrives With a Broken or Missing Seal?

Stop the unload, photograph the seal and doors in the condition they arrived in, and tell the driver before they leave the dock. Keep the physical seal if one is present.

Ask the driver when and where the seal was broken, and record the answer as the driver’s statement rather than as an agreed fact. A missing seal is handled the same way, with one difference: it may mean the seal was never applied at dispatch, which makes it a supplier issue rather than a transit one.

Run the vehicle and load checks on a Delivery Truck Inspection Checklist while the trailer is held.

What If the Seal is Intact but the Number Does Not Match the Paperwork?

Treat a number mismatch as a suspected substitution and hold the load, even though the seal looks untouched. A mismatch means either the trailer was opened and resealed, or the number was recorded incorrectly at dispatch.

Check the simple explanation first. A single transposed digit is often a transcription error at loading, and the dispatching site can usually confirm the applied number from its own seal log. Get that confirmation in writing.

If it cannot be confirmed, the load is treated as compromised until an investigation says otherwise. A driver’s handwritten amendment to the paperwork is not confirmation.

What If the Seal Number Is Illegible or Missing From the Paperwork?

An illegible seal and a blank seal field on the paperwork are both discrepancies. Photograph the seal at close range before cutting, since the photograph may be the only legible record anyone gets. Where the paperwork carries no seal number, there is nothing to verify against, and the load has no evidence of integrity.

What If Customs or Border Officials Broke the Seal in Transit?

A seal broken by customs is a lawful exception, but only when the officer’s replacement seal and identification are documented on the paperwork. Without that, a customs explanation is an unverified claim.

In the UK, HMRC’s Notice 205 is explicit: unless you are an authorised consignee, you must not remove an official customs seal without prior approval from customs, and unauthorised breakage or removal during any part of the journey breaches customs law in Great Britain and Northern Ireland. Goods arriving under an official customs seal also require you to inform your local HMRC control office on arrival. Read HMRC’s guidance on official customs seals and trader sealing before writing your own procedure.

In the US, CBP’s recommended seal procedures require a second seal when a seal is removed in transit, the change to be documented, and the driver to notify dispatch immediately with the new seal number and who broke it.

What Should Be Recorded When a Seal Discrepancy Is Found?

Record the seal number found, the number on the paperwork, the seal’s condition, the date and time, the person who checked it, and photographs of the seal and door hardware. A seal check that produces no record cannot be evidenced later, which is the same as not having happened.

Add the vehicle and trailer registration, the haulier, the consignment reference, the driver’s account, who was notified, and the decision taken. Attaching seal evidence to the delivery record itself, on something like a Proof of Delivery Form, keeps the seal, the load and the signature together.

Where goods move under customs control, UK customs records must generally be kept for four years under the Customs Traders (Accounts and Records) Regulations 1995, and seal evidence runs on the same clock.

Who Decides Whether to Reject, Quarantine or Unload the Load?

A named decision-maker decides, not the operative at the dock, and the procedure should name the role before an incident happens. Dock staff identify and record the discrepancy. Someone with authority over the stock and the commercial relationship decides what happens next.

Notify in this order: the haulier, the transport planner or dispatch site, the customer or consignor, the customs broker where the load is under customs control, and the site quality or security lead.

Rejection is not automatic. BRCGS Storage and Distribution Issue 4 requires, in clause 5.2.5, that where seals are used on fully enclosed vehicle load areas, those seals are checked for integrity before unloading. The standard requires the check and the record, not an automatic refusal, so the decision stays a risk judgement about the product. Quarantine often suits a perishable or time-critical load, because it protects the stock without holding the vehicle.

What If the Seal Check Was Missed and the Trailer is Already Unloaded?

Record the miss as an incident rather than quietly closing it, and segregate the stock while the origin of the load is confirmed. A missed check cannot be recreated afterwards, so the honest record is that integrity was not verified.

A miss that recurs on the same shift or site is a procedural failure, not an individual one, and the fix is a scheduled check with a record attached rather than a reminder to try harder.

How Do You Know Your Seal Checks Are Actually Being Done?

You know seal checks are being done when every check produces a timestamped record with a photograph and a named checker, whether or not anything was wrong. A procedure that only generates paperwork when something fails gives you no way to tell a clean check from a skipped one. A site recording hundreds of deliveries and never a single discrepancy is the pattern to look for.

Four measures are worth tracking:

• Check completion rate per site and per shift, including night shifts and agency cover.
• Discrepancy rate by haulier, route and collection point, which is how repeat problems surface.
• Time from discrepancy found to decision taken, which shows whether escalation works.
• Photograph attachment rate, the fastest proxy for whether checks are real.

A recurring dock audit built from a logistics audit checklist tests whether the written procedure and the behaviour at the dock match.

How Does GoAudits Help With Trailer Seal Checks at Goods-In?

GoAudits turns any check into a timestamped, photographed record that can be found again months later. Goods-in teams run inspections on a phone at the dock, attach photographs, capture a signature, and send a report to the quality lead straight away. The app works offline and syncs when a connection returns, which matters in yards with poor signal.

It suits multi-site distributors and hauliers who need the same check run the same way everywhere. Miniclipper Logistics, a UK road haulage operator running more than 40 vehicles across 300,000 square feet of warehousing, moved audit responsiveness from 65% to 97% and went from six-monthly audits to monthly. Read the Miniclipper Logistics story, or explore logistics inspection software for goods-in and dock checks.