us_utility_bill

Utility bill

Proof of address: provider, account holder, service address and date.

Category: Proof of address
Country: United States
Extracted fields: 11 fields
Cost: 1 credit

us_utility_billspecimen

Provider
Service type
Account holder
Account number
Service address
Postal code
Issue date
Due date
Service period start

Electric, gas, water, internet or phone bills are the usual proof of address. Constaia extracts the provider, account holder and service address, checks that the bill is recent and compares the address with the one you expect.

Pass the expected address in checks.expected_address: abbreviations such as St and Street or Apt and # are normalized.

What it checks

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

Extracted fields

Providerprovider
Service typeservice_type
Account holderaccount_holder
Account numberaccount_number
Service addressservice_address
Postal codepostal_code
Issue dateissue_date
Due datedue_date
Service period startservice_period_start
Service period endservice_period_end
Amount dueamount_due

Where it is used

Sample request

curl https://api.constaia.com/v1/analyze \
  -H "Authorization: Bearer $CONSTAIA_API_KEY" \
  -F "file=@us_utility_bill_specimen.pdf" \
  -F 'options={
    "expect": "us_utility_bill",
    "checks": {
      "max_age_days": 90,
      "holder": {
        "full_name": "Jordan Specimen"
      },
      "expected_address": "742 Example Ave, Springfield, OR 97477"
    },
    "storage": "none"
  }'

Try it for free with a ck_test_ key and the file us_utility_bill_specimen.pdf.

Sample response

Fictitious data. Shortened response.

200 OK · application/json

{
  "id": "an_01J9Z3K8QW4T6Y2B7N5M1R0PXC",
  "object": "analysis",
  "status": "completed",
  "livemode": false,
  "document": {
    "type": "us_utility_bill",
    "label": "Utility bill",
    "confidence": 0.97
  },
  "verdict": {
    "expected": [
      "us_utility_bill"
    ],
    "match": true,
    "status": "valid",
    "reasons": [
      {
        "code": "type_match",
        "severity": "info",
        "message": "The document is: Utility bill."
      }
    ]
  },
  "fields": {
    "provider_name": {
      "value": "EXAMPLE POWER & LIGHT",
      "confidence": 0.99,
      "validated": true
    },
    "account_holder": {
      "value": "JORDAN SPECIMEN",
      "confidence": 0.98,
      "validated": null
    },
    "service_address": {
      "value": "742 EXAMPLE AVE, SPRINGFIELD, OR 97477",
      "confidence": 0.97,
      "validated": null
    },
    "account_number_last4": {
      "value": "0917",
      "confidence": 0.96,
      "validated": null
    },
    "issue_date": {
      "value": "2026-09-05",
      "confidence": 0.99,
      "validated": null
    },
    "due_date": {
      "value": "2026-09-26",
      "confidence": 0.98,
      "validated": null
    },
    "amount_due": {
      "value": 84.37,
      "confidence": 0.97,
      "validated": null
    }
  },
  "checks": [
    {
      "code": "max_age_days",
      "passed": true,
      "message": "The issue date is within the limit."
    },
    {
      "code": "holder_match",
      "passed": true,
      "message": "The holder matches."
    },
    {
      "code": "address_match",
      "passed": true,
      "message": "The address matches the expected one."
    }
  ],
  "warnings": [],
  "storage": {
    "mode": "none",
    "file_deleted_at": "2026-09-29T10:00:02Z",
    "expires_at": null
  },
  "usage": {
    "credits": 1,
    "pages": 2
  }
}

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…

Create your account, copy the test key and validate your first document in five minutes.

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