CARM Bulletin 5422 - Use of Mass Adjustment Case Numbers

August 11, 2026

https://ccp-pcc.cbsa-asfc.cloud-nuage.canada.ca/en/public-bulletins

Trade Chain Partners (TCPs) are not permitted to re-use mass adjustment case numbers on subsequent adjustments (i.e. new CAD versions). They must ensure that when submitting subsequent adjustments (single or mass), previous case numbers in the “CBSA Case No.” field are removed from all lines.

TCPs are also not permitted to generate multiple mass adjustment case numbers and include these on different lines of the same adjustment/CAD version. Only one mass adjustment case number per adjustment/CAD version is permitted.

The CBSA recommends that service providers program their EDI/API systems to identify and prevent these types of errors from occurring.

Failure to follow this guidance will result in adjustment requests being stuck and rejected by the CBSA. Legislative time limits will not be protected when this occurs.

Topic(s)

CBSA Assessment and Revenue Management (CARM)

Information source

Canada Border Services Agency (CBSA)

Disclaimer

The foregoing information is provided for informational purposes only and is not intended as, nor should it be considered, professional advice or a substitute for conducting your own thorough research and review. Before making any decisions or taking any action based on the information provided, you should conduct your own independent investigation and/or seek professional advice from a qualified expert in the relevant field. The CSCB disclaims all liability for actions taken or not taken based on the information provided.

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