The Carta Porte changes are mandatory for all shipping companies in Mexico as established by the Mexican government specifically the Mexican Tax Authority (SAT). Carta Porte changes apply to all shipping companies (cargo airlines, trucks, maritime, railroads, etc.). This applies to cross-border, international and Mexico domestic shipments.
We're actively working with the Rail Industry to issue standardized guidelines for all our partners regarding the new implementation, but it is imperative that you continue complying with the existing requirements until further notice.
Q: What is Carta Porte?
Carta Porte is an annex to the Digitalized Tax Receipts (CFDI) that will help the Mexican Tax Authority (SAT) certify the ownership/type of goods, origin/destination and mode of transportation.
Q: Why Is Carta Porte important?
The Carta Porte requirement is mandatory for all shipments in Mexico. If a shipment does not include this newly required information, it may be at risk of clearance delays and/or interchange delays, as well as setouts. Customers need to be fully compliant to avoid delayed shipments, additional fees or even penalties on the Mexican portion of the shipment.
Q: Which shipments are subject to this requirement?
All cross-border shipments in and out of Mexico, as well as shipments within Mexico via all modes, including train, truck, vessel and airline are subject to Carta Porte requirements.
Q: Where will Carta Porte be enforced?
Because this is a Mexican Tax Authority program, Carta Porte will be enforced within Mexican Territory for shipments that travel within Mexico.
Q: At what point in the shipment process is Carta Porte required?
Prior to scheduling any shipments that travel within Mexico, Carta Porte requirements should be provided.
Q: Who needs to submit Carta Porte to SAT?
Anyone who is planning or scheduling the shipment of goods in Mexico including owners of goods (who carry their own transportation of cargo in Mexico), direct providers of freight transportation, and transportation intermediaries who are responsible for logistics services in Mexico (using their own equipment) will have to comply with the Carta Porte requirements including generating a CFDI with their Carta Porte.
Canadian and U.S. customers are responsible for providing the required information on the waybill to the Mexico carriers/railroads so shipments can move into or within Mexican territory. You may be required to provide the information to a US/CAN rail carrier who can forward your information to the Mexican rail carrier.
Q: What has changed with Carta Porte?
Effective September 30, 2024, the MTC field will become optional
Manual entry of specific fields/segments are required to be compliant. This information must be submitted directly by the Shipper on all shipments via EDI or by waybilling via CPKC Customer Station or MyKCS to avoid penalties.
For those who use our customer portals to ship, we have outlined the changes below:
Customer Station:
- Hazardous Packing Code (MHP)
- This field is mandatory on all hazardous loaded and residue last-contained shipments
- Unit Packing Code (MPC)
- This field is mandatory for all packages where the UNC code is completed
MyKCS (for CPKCM shippers):
- *New field* MXHAZMAT Packing Code
- *New field* SAT MX Unit Packing Code
- *Field enhancement* Multiple UUIDs can be entered
Q: When submitting Carta Porte information, what do customers need to provide and to whom?
Note important links
The Mexican Railroad Association developed a suggested mapping for STCC vs. SAT catalogue for the main carload products identified as moved by rail (500-600 products). Here is the link.
The code source is Mexican Tax Authority (SAT) is available at this link. (in Spanish)
Please use the following table:
