Every so often a dispatcher calls us with a load that doesn't fit the usual Canada-bound story: a trailer picked up in Detroit, dropping in Buffalo, but routed straight across southern Ontario because it's faster and cheaper than looping around Lake Erie. Nothing in that shipment is being imported into Canada. Nothing is getting released by a Canadian broker. The goods just need to pass through Canadian territory on their way from one U.S. point to another. That's an in-transit movement, and the document that controls it is the A8B — the United States-Canada Transit Manifest.
A8B trips confuse people because they look like a Canada crossing on paper (you're stopping at a CBSA booth, after all), but they're not a Canadian import in any legal sense. The goods stay "in bond" the entire time they're on Canadian soil, sealed and accounted for, until they re-enter the U.S. and CBP closes the loop. Get the paperwork right and it's a clean, fast transit. Get it wrong — mismatched seals, a missing copy, a manifest that doesn't match the waybill — and you can end up with a truck sitting at a secondary lot while two countries' customs agencies sort out where your freight actually is.
1) What an A8B in-transit manifest is (and isn't)
The A8B — officially the United States-Canada Transit Manifest (also carried historically as Form 7512-B on the U.S. side) — is a joint CBSA/CBP cargo control document built specifically for in-transit movements. CBSA's own guidance defines in-transit as the movement of goods from one point in the United States to another point in the United States, transiting Canadian territory, or the movement of foreign goods through Canada from one foreign point to another (CBSA Memorandum D3-4-2).
In plain dispatch language: nothing on an A8B trip is being sold, delivered, or released in Canada. The freight is riding through the country the way a car might cut through a neighboring state to save twenty minutes — except with a customs bond, a sealed trailer, and a paper trail attached to every mile.
Historically, the A8B has always been a paper-forward document. Older CBSA memoranda (D3-4-5, since folded into current highway guidance) describe the form being prepared in quadruplicate, with each copy playing a specific role as the truck moves from the U.S. exit port to the Canadian entry port, across the country, and back out into the U.S. at re-entry.
2) A8B vs. A8A vs. a normal ACI import — the real difference
These three get mixed up constantly, so it's worth putting them side by side the way we'd explain it to a new dispatcher.
A normal ACI/eManifest import
Goods are entering Canada to be released to a Canadian consignee. The carrier files ACI/eManifest data electronically, a broker submits a release request (often PARS), and the goods clear customs somewhere inside Canada. We've covered that workflow in detail in our A8A in-bond documents post, but the short version is: the freight's final stop is in Canada.
A8A — in-bond
The goods are also headed to a point inside Canada, but they're not cleared at the first port of arrival. Instead, they move "in-bond" to an inland sufferance warehouse or another CBSA office where release actually happens. The A8A (Cargo Control Document) — sometimes labeled A8A(B) on the form itself — is the CCD that controls that inland movement. The goods are still bound for Canada; they just haven't been accounted for yet.
A8B — in-transit
The goods are not headed to Canada at all. They start in the U.S. (or another foreign country) and end in the U.S. (or another foreign country). Canada is just the road. CBSA's guidance is explicit that this "domestic in-transit" movement is different from a standard in-bond movement and gets its own form and its own procedure.
3) When you actually need an A8B
Not every cross-border-adjacent load needs an A8B. It applies specifically to:
- Freight moving from one U.S. point to another U.S. point, physically transiting Canadian territory by highway.
- Freight moving from one Canadian point to another Canadian point, physically transiting U.S. territory (the reverse direction — same form, same logic, opposite flag).
- Certain foreign-to-foreign movements that happen to cross Canadian territory, per CBSA's in-transit definition.
It does not apply to goods that are actually being imported into Canada (even temporarily for processing or warehousing) or exported permanently from Canada — those scenarios run through standard ACI/eManifest and, where applicable, an A8A in-bond movement instead. CBSA's highway memoranda also note narrower exclusions, such as goods that arrive by one mode and transfer to another mode for the outward leg — those don't get documented on an A8B either.
Worth flagging for planning purposes: CBSA's current highway guidance notes that in-transit conveyances are exempt from the mandatory ACI/eManifest electronic filing requirement, and CBSA has stated it will not issue AMPS penalties for carriers who don't transmit electronic in-transit conveyance data. That's exactly why the physical A8B carries so much operational weight on these trips — for many in-transit movements, it's still the primary control document CBSA relies on, not a backup to an electronic filing.
4) CCN, ports of entry/exit, bonded carriers, and seals
An A8B trip has more moving parts than a standard PARS shipment because the truck is going to touch CBSA at least twice — once entering Canada, once leaving it — and CBP at least twice on the U.S. side.
Cargo control number (CCN)
Like every CBSA cargo control document, the A8B carries a cargo control number tied to the carrier code. That CCN is what ties the arrival copy, the exit copy, and the re-entry copy back together as the same shipment moving through the same trip. If your fleet also runs standard ACI-managed loads, keep A8B numbering in its own recognizable series so nobody at dispatch confuses an in-transit CCN with a PARS or in-bond CCN.
Bonded carrier requirement
In-transit movements are a bonded-carrier function. The CBSA bond number goes directly on the A8B, and it's what backs the promise that the sealed freight riding through Canada will actually exit where and when it's supposed to. If your fleet runs occasional in-transit loads rather than daily ones, this is worth confirming with your customs broker or compliance contact before you accept the load — being ACI-registered as a highway carrier is not automatically the same thing as being set up to run bonded in-transit trips.
Ports of entry and exit
The A8B explicitly tracks a port (and date) of arrival into Canada and a port (and date) of exit from Canada. Both get reviewed and stamped by the officer at each end. This is different from a standard import, where you generally only care about a single first port of arrival. On an A8B trip, dispatch has to plan and communicate two crossing events, not one, and both need to line up with the route the driver actually ran.
Sealing
Sealing is where a lot of in-transit trips live or die. CBSA officers verify and record seal numbers at arrival, and again check that seals are intact at the port of exit — if they're not, that gets documented as an irregularity directly on the manifest. Practically, that means:
- Apply the seal before you reach the first Canadian port and record the seal number on your paperwork before the driver leaves the yard.
- Never let a driver break a seal mid-route "to check something." If a seal has to be broken for a legitimate reason, that has to go through the proper reporting channel, not get discovered cold at the exit port.
- Double-check the seal number written on the manifest matches the physical seal on the trailer — a transposed digit here is a classic source of "irregularity" flags.
5) A practical dispatch workflow for a clean in-transit trip
Here's the sequence that keeps A8B trips boring — in the best way.
Step 1 — Confirm the trip is genuinely in-transit
Before anything else, confirm the origin and final destination are both outside Canada. If there's any chance the load gets diverted to a Canadian consignee mid-route, that's not an A8B trip anymore — flag it to your broker before dispatch builds the paperwork around the wrong document.
Step 2 — Prepare the A8B in quadruplicate
The A8B is completed with carrier details, tractor/trailer identification, port of departure (U.S. side), CBSA bond number, and the waybill numbers, package counts, and cargo description for everything on board. Historically this travels as a four-copy set — arrival, exit, re-entry, and carrier copies — so the paperwork can be split at each checkpoint without losing the shipment's full history.
Step 3 — Seal the trailer and record the number before departure
Don't leave sealing as a border-side task. Seal at the yard, log the number on the manifest, and brief the driver on what that number is supposed to be so they can sanity-check it themselves before the first stop.
Step 4 — Present at the first Canadian port of arrival
The driver stops, presents all copies of the A8B, and the officer reviews the manifest against the waybills and the physical load where warranted. Copies get stamped and initialed; the driver keeps the set moving forward while the arrival copy stays on file pending acquittal.
Step 5 — Run the route without deviation
In-transit means exactly that. Don't route through an unplanned stop, don't drop the trailer at a yard partway through, and don't let the load sit longer than the trip reasonably requires. Deviations invite questions that a straight-through in-transit run never has to answer.
Step 6 — Present at the Canadian port of exit
The exiting officer checks that seals are intact, verifies there's no irregularity, and processes the exit copy. If everything matches, this step is fast — which is the entire point of doing steps 1 through 5 correctly.
Step 7 — Close the loop at U.S. re-entry
CBP reviews and stamps the remaining copies at the U.S. side, and the trip is acquitted once all the paperwork reconciles. Keep the carrier copy on file — it's your proof the trip was reported and closed out cleanly if anything gets questioned later.
6) The mistakes that turn a transit into a delay
1) Treating it like a standard PARS/ACI shipment
The biggest recurring error we hear about is a broker or carrier defaulting to their normal Canada-bound import process for a load that's actually in-transit. Different document, different logic, different filing exemption. Confirm which category a load falls into before paperwork gets built.
2) Incomplete or mismatched copies
Four copies exist for a reason. A driver who loses the exit copy partway through the route, or who has a copy with a different seal number than the one physically on the trailer, is the classic setup for a secondary referral.
3) Sloppy cargo descriptions
Just like ACI filings, an A8B with vague descriptions ("freight," "general goods") makes it harder for an officer to reconcile the manifest against the waybills quickly. Specific, consistent descriptions across the manifest and the waybill keep the review short.
4) Seal handling errors
Whether it's a wrong number recorded, a seal applied late, or a seal broken without documentation, this is the single fastest way to convert a routine transit into an irregularity report.
5) Route or timing deviations without a heads-up
An in-transit shipment that takes an unusually long time to cross, or that shows up at the exit port from an unexpected direction, raises questions. If there's a legitimate reason (weather, mechanical issue, DOT-mandated rest), have the driver ready to explain it and, where appropriate, loop in your broker or compliance contact proactively rather than reactively.
7) Why the physical, barcoded A8B still matters at the booth
In a world where ACI/eManifest has pushed most Canada-bound freight toward electronic pre-arrival data, it's easy to assume every document is trending digital. In-transit is the exception. Because in-transit conveyances are generally exempt from the mandatory electronic ACI filing requirement, the physical A8B often is the primary record CBSA and CBP rely on for these movements — not a paper backup to something already on file electronically.
That makes legibility and consistency at the booth more important, not less. A clean, barcoded A8B that an officer can scan and cross-reference quickly does the same job a barcoded ACI lead sheet does on a standard import trip: it turns a manual lookup into a five-second scan.
Fleets that run in-transit lanes regularly tend to keep a dedicated pad of A8B forms in the truck at all times, the same way they'd keep PARS or PAPS supplies on hand — because an in-transit load can show up on short notice, and scrambling to source the right form at a truck stop is not a great use of anyone's afternoon.
8) BorderPrint A8B in-transit manifests: standard and barcoded
Printed to the standard A8B layout so your trip packet matches what CBSA and CBP officers expect to see at each checkpoint of an in-transit move.
- Non-barcoded pads — riveted packets with carbon copies, built for fleets that fill in trip details by hand at dispatch
- Barcoded option for fleets that want a scannable reference on each copy
Shop options: A8B In-Transit Manifests (this page) or the barcoded A8B In-Transit Manifests.
Both formats print to the same completion logic described in CBSA's guidance — carrier details, tractor/trailer identification, ports of departure and re-entry, bond number, and waybill-level cargo detail — so whichever version fits your workflow, the document itself is doing the same job at the booth. If your fleet also runs standard in-bond moves, browse the full in-transit manifests collection to compare formats side by side before you settle on what to keep stocked in the truck.
9) How A8B fits with ACI, A8A, and seals in the trip packet
Most fleets that run mixed Canada-U.S. lanes end up with three or four document families in rotation, and it's worth being clear on how they relate rather than treating each one as an isolated form.
ACI/eManifest (standard Canada-bound imports)
For freight actually being imported into Canada, ACI/eManifest is the pre-arrival electronic filing requirement, and the printed lead sheet is what the driver hands over at the booth so the officer can pull up the record. We cover that workflow, the data CBSA expects, and the lead-sheet formats carriers rely on in our ACI eManifest lead sheets product line. In-transit loads sit outside that electronic filing mandate, which is exactly why the physical A8B carries more weight on these trips.
A8A (in-bond, inland Canadian destinations)
When freight is genuinely headed to a Canadian consignee but hasn't been released at the first port of arrival, it moves in-bond under an A8A instead. We go deeper on that workflow, the CCN handling, and the document variants in our A8A in-bond cargo control documents post. The quick distinction to remember: A8A freight is going somewhere in Canada eventually; A8B freight is never staying in Canada at all.
Seals
Whether you're running an in-bond A8A move or an in-transit A8B move, seal discipline is the thread that ties the paperwork to the physical trailer. CBSA verifies seal numbers on arrival and checks that they're intact at exit for in-transit loads specifically — so the seal number on your manifest has to match the seal on the trailer down to the digit, every single time.
Related reading:
- A8A in-bond cargo control documents explained (in-bond, inland Canadian moves)
- ACI eManifest lead sheets explained (pre-arrival filing for Canadian imports)
Authority references: CBSA Memorandum D3-4-2 — Highway pre-arrival and reporting requirements and the CBSA A8B form reference page.
10) FAQ
Do I need an A8B if my load is actually being delivered somewhere in Canada?
No. The A8B is specifically for in-transit movements where Canada is only the route, not the destination — for example, U.S.-to-U.S. freight transiting Canadian territory. If the freight is genuinely destined for a Canadian consignee, you're looking at a standard ACI-managed import or, if it moves inland before release, an A8A in-bond document instead.
Does an in-transit shipment still need electronic ACI/eManifest data?
CBSA's highway guidance notes that in-transit conveyances are generally exempt from the mandatory electronic ACI/eManifest filing requirement, and that the agency does not issue AMPS penalties for carriers who don't transmit electronic in-transit conveyance data. That's part of why the physical A8B carries so much weight on these trips — always confirm current requirements for your specific lane with your customs broker.
What happens if a seal is broken or missing when the truck reaches the Canadian exit port?
CBSA officers check that seals are intact at the port of exit as part of the A8B process, and any discrepancy gets documented directly on the manifest as an irregularity. That can mean additional questions, delays, and paperwork well beyond what a routine in-transit crossing would involve, so seal accuracy from the moment of departure matters as much as the paperwork itself.