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Border crossing

PAPS vs PARS: which number do you need at the border?

The direction of the trip decides it. PAPS is the usual release process for truck cargo into the United States. PARS is the usual release process for truck cargo into Canada.

What is the difference between PAPS and PARS?

PAPS and PARS compared
PAPSPARS
Full namePre-Arrival Processing SystemPre-Arrival Review System
DirectionInto the United StatesInto Canada
Government agencyU.S. Customs and Border Protection (CBP)Canada Border Services Agency (CBSA)
Manifest systemACE eManifest (CBP)ACI eManifest (CBSA)
Who gives the numberThe truck carrier (starts with its SCAC)The truck carrier (starts with its CBSA carrier code)
Who uses the numberThe U.S. customs broker, on the customs entryThe Canadian customs broker, on the release request

A PAPS number starts with the carrier's SCAC. A PARS number (a cargo control number) starts with the carrier's CBSA carrier code, which is a separate 4-character code. The driver carries a barcode sheet, and the border officer scans it.

How early must the data reach the border agency?

For the United States, CBP must receive the ACE eManifest at least 1 hour before the truck arrives, or 30 minutes for a shipment that qualifies for FAST processing (19 CFR 123.92). The customs entry must also be on file before arrival.

For Canada, the CBSA must receive the carrier's ACI highway data at least 1 hour before the truck arrives at the first Canadian port (CBSA Memorandum D3-4-2). The Canadian broker sends the release request under the PARS number.

Do I need both numbers on one trip?

Only if the truck crosses in both directions with cargo. A truck from Montreal to New York needs a PAPS for the trip south. If it comes back to Canada with a new load, that load needs a PARS.

Going into the United States without a carrier?

Allied CHB files the ACE eManifest (PAPS) and the U.S. customs entry for selected requests on the same day. Estimates: PAPS $500, entry $125.

Questions

Who provides a PARS number?

The carrier assigns the PARS cargo control number. The Canadian customs broker uses it for the release request. Our same-day service is for the PAPS direction, into the United States.

Is a PAPS number the same as a PARS number?

No. They are different numbers in different systems. Each number belongs to one shipment in one direction.

Going south into the United States?

Request a same-day PAPS and clearance. CBP needs the eManifest at least 1 hour before the truck arrives.

(908) 291-8001 info@alliedchb.com

Sources

Last reviewed September 26, 2026. This page explains customs rules in general terms. It is not legal advice. Duty rates and CBP procedures change often, and we confirm the figures for your shipment in writing before you commit.