br_cnh

Brazilian driver's license (CNH)

Brazilian driver's license (SENATRAN/DETRAN), paper or digital (CNH-e); valid as an ID document. Shows the registration number, CPF and RG.

Category: Driver licenses
Country: Brazil
Extracted fields: 14 fields
Cost: 1 credit

br_cnhspecimen

Document number
First name
Last name
Date of birth
Issue date
Expiry date
Categories
Restrictions
Address

What it checks

National identifiers. Official checksum or format of the number (NIF, CPF, CURP, RUT, SSN…).br_cnh, br_cpf
Holder. Name, number or date of birth match what you expect.
Age. Minimum or maximum age from the date of birth.
Validity. Not expired on the reference date.

Extracted fields

Document numberdocument_number
First namefirst_name
Last namelast_name
Date of birthbirth_date
Issue dateissue_date
Expiry dateexpiry_date
Categoriescategories
Restrictionsrestrictions
Addressaddress
Issuing authorityissuing_authority
Cpfcpf
Rgrg
First licence datefirst_licence_date
Mother namemother_name

Sample request

curl https://api.constaia.com/v1/analyze \
  -H "Authorization: Bearer $CONSTAIA_API_KEY" \
  -F "file=@document.pdf" \
  -F 'options={
    "expect": "br_cnh",
    "checks": {
      "not_expired": true,
      "holder": {
        "full_name": "Carmen Especimen Ruiz"
      }
    },
    "storage": "none"
  }'

Sample response

Fictitious data. Shortened response.

200 OK · application/json

{
  "id": "an_01J9Z3K8QW4T6Y2B7N5M1R0PXC",
  "object": "analysis",
  "status": "completed",
  "livemode": false,
  "document": {
    "type": "br_cnh",
    "label": "Brazilian driver's license (CNH)",
    "confidence": 0.97
  },
  "verdict": {
    "expected": [
      "br_cnh"
    ],
    "match": true,
    "status": "valid",
    "reasons": [
      {
        "code": "type_match",
        "severity": "info",
        "message": "The document is: Brazilian driver's license (CNH)."
      }
    ]
  },
  "fields": {
    "document_number": {
      "value": "12345678026",
      "confidence": 0.99,
      "validated": true
    },
    "first_name": {
      "value": "ANA",
      "confidence": 0.98,
      "validated": null
    },
    "last_name": {
      "value": "ESPÉCIME DA SILVA",
      "confidence": 0.97,
      "validated": null
    },
    "birth_date": {
      "value": "1985-07-30",
      "confidence": 0.96,
      "validated": null
    },
    "issue_date": {
      "value": "2023-02-01",
      "confidence": 0.99,
      "validated": null
    },
    "expiry_date": {
      "value": "2033-02-01",
      "confidence": 0.98,
      "validated": null
    },
    "categories": {
      "value": [
        "AB"
      ],
      "confidence": 0.97,
      "validated": null
    },
    "cpf": {
      "value": "529.982.247-25",
      "confidence": 0.96,
      "validated": null
    },
    "rg": {
      "value": "12345678 SSP SP",
      "confidence": 0.99,
      "validated": null
    },
    "first_licence_date": {
      "value": "2005-09-10",
      "confidence": 0.98,
      "validated": null
    }
  },
  "checks": [
    {
      "code": "id_number",
      "passed": true,
      "message": "id_number"
    }
  ],
  "warnings": [],
  "storage": {
    "mode": "none",
    "file_deleted_at": "2026-09-29T10:00:02Z",
    "expires_at": null
  },
  "usage": {
    "credits": 1,
    "pages": 1
  }
}

FAQ

Does Constaia prove the document is authentic?

No. It checks the type, data consistency and your rules, and flags signals such as a possible edit or a screen photo. That does not prove authenticity.

Is a copy of the document kept?

No, unless you ask for it. With storage "none" (the default) the file is deleted when the analysis ends.

And for the record…

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