What is a Carta Porte Ferroviario?

A Carta Porte for rail transport certifies the legal transport of goods by train in Mexico. Required by SAT for any rail cargo movement. Brinta embeds the CartaPorte 3.1 complement automatically.

Field	Value
`invoice_type`	`transport`
`document_type`	`bill of lading rail`
`e_invoice`	`true`
`currency`	`MXN`

Key Differences from Road

Feature	Road	Rail
`transportation_data`	`date_time` + `distance`	`date_time` + `distance` + `station_external_id` + `station_name` + `station_type`
`vehicle.categories[]`	Truck fields	Railcar fields
`vehicle.type`	Not required	Set to `rail`
Multiple transport figures	Usually 1 driver	Often 1 rail company + 1 operator

Field by Field

`senders[].company.transportation_data`

Field	Required	What to send
`date_time`	Yes	Departure datetime ISO 8601 from the origin station.
`station_external_id`	Yes	SICT station code (e.g. `SLP-01`). Maps to SAT `NumEstacion`.
`station_name`	Yes	Full station name (e.g. `Estacion San Luis Potosi`). Maps to SAT `NombreEstacion`.
`station_type`	Yes	Always `01` for origin stations. Maps to SAT `c_TipoEstacion`.
`distance`	Yes	Distance in km between origin and destination stations.

`beneficiaries[].company.transportation_data`

Field	Required	What to send
`date_time`	Yes	Arrival datetime ISO 8601.
`station_external_id`	Yes	SICT code of destination station.
`station_name`	Yes	Destination station name.
`station_type`	Yes	Always `02` for destination stations.

distance is only required in senders, not in beneficiaries.

`transportation_companies[]`

Rail transport typically has two figures:

Figure	`type`	When to include
Rail company	`02` (Propietario)	Always — the company that owns and operates the railway.
Operator	`01` (Operador)	When there is an individual operator assigned to the train.

For rail companies (type: "02"), only include RFC in tax_registrations — no license number needed.

For individual operators (type: "01"), include both RFC and license number MX.

`vehicle` — Railcar

Set vehicle.type to rail. All attributes sent as categories[] entries.

Required fields

`list` value	What to send in `code`	SAT field
`service type`	SAT `c_TipoDeServicio` code	`TipoDeServicio`
`traffic type`	SAT `c_TipoDeTrafico` code	`TipoDeTrafico`
`right of way`	SAT `c_DerechosDePaso` code	`TipoDerechoDePaso`
`paid km`	Kilometers paid for right of way (e.g. `630`)	`KilometrajePagado`
`railcar type`	SAT `c_TipoCarro` code (e.g. `BOXC` for boxcar)	`TipoCarro`
`railcar plate`	Railcar identification number	`MatriculaCarro`
`waybill number`	Rail waybill number	`GuiaCarro`
`railcar net tonnage`	Net tonnage capacity of the railcar	`ToneladasNetasCarro`

Optional fields

`list` value	What to send in `code`	SAT field
`container type`	SAT `c_Contenedor` code	`TipoContenedor`
`empty container weight`	Empty container weight in kg	`PesoContenedorVacio`
`merchandise net weight`	Net weight of goods in kg	`PesoNetoMercancia`
`insurance name`	Insurer name	`NombreAseg`
`insurance policy number`	Policy number	`NumPolizaSeguro`

Key field explanations

`right of way`

SAT c_DerechosDePaso. The type of track rights used for this movement.

Value	Description
`01`	Own track — the carrier owns the rail line
`02`	Interconnection — using another company's track
`03`	Via passage — crossing through another company's track

`paid km`

The distance in kilometers that was actually paid for the right of way. This is the billable distance, which maps to KilometrajePagado in SAT. Usually matches the distance in transportation_data.

Full Example Payload

{
  "supplier_company_id": "{{company_id}}",
  "invoice_type": "transport",
  "document_type": "bill of lading rail",
  "invoice_date": "2025-09-03",
  "export_reason": "01",
  "e_invoice": true,
  "currency": "MXN",
  "reason": "G03",
  "senders": [
    {
      "company": {
        "name": "REMITENTE EJEMPLO S.A. DE C.V.",
        "type": "business",
        "address": { "address_line_1": "Calle Ferrocarril 1", "state": "MX-SLP", "country": "MX", "postal_code": "78090" },
        "tax_registrations": [
          { "type": "RFC", "number": "REM930215S87", "level": "country", "location": "MX" }
        ],
        "transportation_data": {
          "date_time": "2025-09-03T06:00:00",
          "station_external_id": "SLP-01",
          // SICT station code for origin
          "station_name": "Estacion San Luis Potosi",
          "station_type": "01",
          // Always 01 for origin station
          "distance": 630.0
        }
      }
    }
  ],
  "beneficiaries": [
    {
      "company": {
        "name": "DESTINATARIO EJEMPLO S.A. DE C.V.",
        "type": "business",
        "address": { "address_line_1": "Blvd. Industrial 300", "state": "MX-CHH", "country": "MX", "postal_code": "32470" },
        "tax_registrations": [
          { "type": "RFC", "number": "DES890423H71", "level": "country", "location": "MX" }
        ],
        "transportation_data": {
          "date_time": "2025-09-05T20:00:00",
          "station_external_id": "CHH-01",
          "station_name": "Estacion Chihuahua",
          "station_type": "02"
          // Always 02 for destination — no "distance" here
        }
      }
    }
  ],
  "vehicle": {
    "type": "rail",
    "categories": [
      { "code": "01", "list": "service type" },
      // SAT c_TipoDeServicio
      { "code": "01", "list": "traffic type" },
      // SAT c_TipoDeTrafico
      { "code": "01", "list": "right of way" },
      // 01 = own track
      { "code": "630", "list": "paid km" },
      // Billable distance in km
      { "code": "BOXC", "list": "railcar type" },
      // SAT c_TipoCarro — BOXC = boxcar
      { "code": "FERR-1234", "list": "railcar plate" },
      { "code": "WB-2025-001", "list": "waybill number" },
      { "code": "90", "list": "railcar net tonnage" },
      { "code": "TC", "list": "container type" },
      { "code": "1000.00", "list": "empty container weight" },
      { "code": "99000.00", "list": "merchandise net weight" },
      { "code": "QUALITAS", "list": "insurance name" },
      { "code": "QUA-123456", "list": "insurance policy number" }
    ]
  },
  "transportation_companies": [
    {
      "company": {
        "name": "FERROVIARIA EJEMPLO S.A. DE C.V.",
        "type": "02",
        // 02 = Propietario — the rail company
        "address": { "address_line_1": "Av. Insurgentes Sur 1000", "state": "MX-CMX", "country": "MX", "postal_code": "03100" },
        "tax_registrations": [
          { "type": "RFC", "number": "FEJ020101CD3", "level": "country", "location": "MX" }
          // Rail company — RFC only, no license number
        ],
        "transportation_data": { "vehicle_type": "01" }
      }
    },
    {
      "company": {
        "name": "CARLOS ROMERO HERNANDEZ",
        "type": "01",
        // 01 = Operador — the individual train operator
        "address": { "address_line_1": "Calle Juarez 55", "state": "MX-SLP", "country": "MX", "postal_code": "78000" },
        "tax_registrations": [
          { "type": "RFC", "number": "ROHC750820EF5", "level": "country", "location": "MX" },
          { "type": "license number MX", "number": "L-98765432", "level": "country", "location": "MX" }
          // Operator — needs both RFC and license number MX
        ],
        "transportation_data": { "vehicle_type": "01" }
      }
    }
  ]
}

Common Mistakes

Mistake	What happens	Fix
`station_type` `01` on destination	SAT validation error	Origin = `01`, destination = `02`
`distance` included in `beneficiaries`	Brinta validation error	Only include `distance` in `senders`
Rail company missing operator	Incomplete CFDI	Always include at least one `type: "01"` operator
Operator missing `license number MX`	SAT rejects the figure	Always send both RFC and license number for operators
`paid km` doesn't match `distance`	SAT audit flag	They should match unless special billing applies
`right of way` missing	SAT validation error	Always required for rail transport