PARS & PAPS: Truck Clearance at the Canada–US Border
Last reviewed: June 2026 · 5 minute read
When a truck crosses the Canada–US border, the goal is for customs to have reviewed the shipment before the driver reaches the booth. Two barcode systems make that happen: PARS northbound into Canada, PAPS southbound into the US. Same idea, opposite directions, different agencies.
Northbound into Canada: PARS
PARS (Pre-Arrival Review System) is a CBSA process. The carrier assigns a PARS barcode to the shipment and sends the paperwork to the Canadian customs broker. The broker files the entry referencing that barcode; CBSA reviews it pre-arrival. When the driver presents the barcode at the border, the system already knows the answer — most trucks are released in minutes.
Step
Who
What happens
1
Carrier
Assigns PARS number, sends invoice package to the Canadian broker
2
Broker (us)
Files the customs entry against the PARS number before the truck arrives
3
Carrier
Transmits its ACI eManifest (separate obligation — both must be on file)
4
Driver
Presents the barcode at the booth; CBSA releases or refers for exam
When PARS isn't set up in time, the truck either waits at the border while paperwork catches up, or moves in bond to an inland sufferance warehouse for clearance there — both cost time and money.
Southbound into the US: PAPS
PAPS (Pre-Arrival Processing System) is the US CBP mirror image: the carrier assigns a PAPS barcode, the paperwork goes to a US customs broker who files the US entry, and the carrier transmits an ACE eManifest to CBP. As your Canadian forwarder we coordinate the truck, the documents, and the timing with your US broker — we don't file US entries ourselves.
What makes truck clearance go wrong
Invoice package sent to the wrong broker, or late — the #1 cause of border waits
PARS entry filed but carrier eManifest missing (or vice versa) — both systems must agree
Commodity needing a permit (CFIA, etc.) discovered at the booth instead of at booking
Driver arrives before the entry is on file — dispatch and filing must be synchronized
On our cross-border trucking service, the truck and the Canadian customs work sit with one team, so the synchronization problems above simply don't get a chance to happen.
Educational overview only — CBSA and CBP processes evolve. Verify current requirements for your shipment or ask our team.
FAQ
Frequently asked questions
PARS vs PAPS — which one do I need?▼
Direction decides it: PARS for freight moving north into Canada (a CBSA process, filed by a Canadian customs broker), PAPS for freight moving south into the US (a CBP process, filed by a US broker). A cross-border round trip uses both, one per leg. The mechanics mirror each other — carrier assigns a barcode, broker files against it, customs reviews before the truck arrives.
What happens if a truck reaches the Canadian border and PARS isn't on file?▼
The driver either waits at the port of entry while the entry catches up, or the goods move in bond to an inland sufferance warehouse to be cleared there — both burn hours or days and usually money. The root cause is almost always upstream: the invoice package went to the wrong broker or went late. Synchronizing dispatch with the broker's filing is the whole game.
Is eManifest the same thing as PARS?▼
No — they're two separate filings that must both be on file before the truck arrives. The carrier transmits the ACI eManifest (conveyance and cargo data); the broker files the release request against the PARS barcode. If either is missing or they don't agree, the truck doesn't clear, which is why carrier and broker need to be working from the same paperwork.
How long does PARS clearance take at the border?▼
When the entry is filed and CBSA has processed it pre-arrival, most trucks are through the booth in minutes — the review already happened. But CBSA can refer any truck for examination at its discretion, so no one can guarantee a crossing time on any given day. The controllable part is making sure nothing is missing when the driver arrives; the rest is the border being the border.
Who assigns the PARS number?▼
The trucking carrier — PARS barcodes come from the carrier's own number range, get stickered onto the invoice package, and tie the physical truck to the broker's entry in CBSA's system. As the importer you'll rarely touch one, but you should care that your supplier's paperwork reaches the carrier and the correct Canadian broker early enough to file before the truck rolls.
Rather Just Hand It Off?
This is the work we do every day. Get a quote and let our licensed team handle the details.