es_family_book

Spanish family book

Holders and children listed in the Spanish family book (libro de familia).

Category: Civil records
Country: Spain
Extracted fields: 2 fields
Cost: 2 credits

es_family_bookspecimen

Holders
Children

To prove a relationship with a minor or large-family status. Constaia extracts the holders and the children with their dates of birth.

Pages count: every 2 extra pages add 1 credit.

What it checks

No type-specific deterministic validators: your checks apply (required fields, dates, holder).

Extracted fields

Holdersholders
Childrenchildren

Sample request

curl https://api.constaia.com/v1/analyze \
  -H "Authorization: Bearer $CONSTAIA_API_KEY" \
  -F "file=@document.pdf" \
  -F 'options={
    "expect": "es_family_book",
    "checks": {
      "require_fields": [
        "children"
      ]
    },
    "storage": "none"
  }'

Sample response

Fictitious data. Shortened response.

200 OK · application/json

{
  "id": "an_01J9Z3K8QW4T6Y2B7N5M1R0PXC",
  "object": "analysis",
  "status": "completed",
  "livemode": false,
  "document": {
    "type": "es_family_book",
    "label": "Spanish family book",
    "confidence": 0.97
  },
  "verdict": {
    "expected": [
      "es_family_book"
    ],
    "match": true,
    "status": "valid",
    "reasons": [
      {
        "code": "type_match",
        "severity": "info",
        "message": "The document is: Spanish family book."
      }
    ]
  },
  "fields": {
    "holders": {
      "value": "MARÍA GARCÍA LÓPEZ; PABLO RUIZ SANZ",
      "confidence": 0.99,
      "validated": true
    },
    "children": {
      "value": "LUCÍA RUIZ GARCÍA (2015-05-03)",
      "confidence": 0.98,
      "validated": null
    }
  },
  "checks": [],
  "warnings": [],
  "storage": {
    "mode": "none",
    "file_deleted_at": "2026-09-29T10:00:02Z",
    "expires_at": null
  },
  "usage": {
    "credits": 2,
    "pages": 4
  }
}

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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