mx_curp_certificate

Mexican CURP certificate

Certificate of the Unique Population Registry Code (RENAPO), downloadable from gob.mx.

Category: Civil records
Country: Mexico
Extracted fields: 8 fields
Cost: 1 credit

mx_curp_certificatespecimen

Curp
Holder name
Date of birth
Birth state
Sex
Nationality
Registration document
Issue date

What it checks

National identifiers. Official checksum or format of the number (NIF, CPF, CURP, RUT, SSN…).mx_curp
Holder. Name, number or date of birth match what you expect.
Recency. Issued less than N days ago.

Extracted fields

Curpcurp
Holder nameholder_name
Date of birthbirth_date
Birth statebirth_state
Sexsex
Nationalitynationality
Registration documentregistration_document
Issue dateissue_date

Sample request

curl https://api.constaia.com/v1/analyze \
  -H "Authorization: Bearer $CONSTAIA_API_KEY" \
  -F "file=@document.pdf" \
  -F 'options={
    "expect": "mx_curp_certificate",
    "checks": {
      "max_age_days": 90,
      "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": "mx_curp_certificate",
    "label": "Mexican CURP certificate",
    "confidence": 0.97
  },
  "verdict": {
    "expected": [
      "mx_curp_certificate"
    ],
    "match": true,
    "status": "valid",
    "reasons": [
      {
        "code": "type_match",
        "severity": "info",
        "message": "The document is: Mexican CURP certificate."
      }
    ]
  },
  "fields": {
    "curp": {
      "value": "PEPJ850730HDFRRN01",
      "confidence": 0.99,
      "validated": true
    },
    "holder_name": {
      "value": "JUAN PEREZ PEREZ",
      "confidence": 0.98,
      "validated": null
    },
    "birth_date": {
      "value": "1985-07-30",
      "confidence": 0.97,
      "validated": null
    },
    "birth_state": {
      "value": "CIUDAD DE MEXICO",
      "confidence": 0.96,
      "validated": null
    },
    "sex": {
      "value": "M",
      "confidence": 0.99,
      "validated": null
    },
    "nationality": {
      "value": "MEXICANA",
      "confidence": 0.98,
      "validated": null
    },
    "issue_date": {
      "value": "2026-09-01",
      "confidence": 0.97,
      "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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