United Kingdom Citizens Verification API

Onboarding users in United Kingdom means confirming they are who they claim to be. Verifies data against government agency sourced electoral roll data. A document or a typed-in detail only proves the data exists — not that it is genuine or belongs to the person in front of you. United Kingdom Citizens Verification closes that gap by checking the data against the official citizenship / civil registry. This guide explains what the check does, the exact technical details, and how to integrate it in minutes.

Key takeaways:

• What it checks — United Kingdom Citizens Verification validates citizenship record against the official citizenship / civil registry.
• What you get back — a normalized match_type plus field-level results you can route straight into approve / review / reject logic.
• Why it matters — Confirming citizenship status against the source registry stops identity fabrication and supports residency, benefits, and regulated-onboarding checks.
• How to use it — one POST to Didit's database-validation endpoint, or a no-code workflow module. $0.75 per conclusive query, results in seconds.

What United Kingdom Citizens Verification validates

Verifies data against government agency sourced electoral roll data. Didit exposes it through a single endpoint so you can verify the submitted data against the official citizenship / civil registry and receive a structured, normalized result — not a raw registry dump you have to parse yourself.

A conclusive response returns the matched source_data and a per-field validation block, so your risk engine gets a clear, machine-readable verdict.

Why it matters

Confirming citizenship status against the source registry stops identity fabrication and supports residency, benefits, and regulated-onboarding checks.

For regulated businesses in United Kingdom — fintechs, crypto platforms, lenders, marketplaces, and gaming operators — checking against an authoritative source produces a defensible, auditable record that identity was confirmed at the source, not merely captured from a form or a photo.

Technical details

Didit exposes this service through the unified database-validation endpoint. It is a single POST — no SDK required.

Endpoint

POST /v3/database-validation/

Request parameters

Parameter	Type	Required	Description
issuing_state	string	Yes	ISO 3166-1 alpha-3 country code. Use GBR.
services	string	Yes	Service identifier. Use gbr_kingdom_citizens.
first_name	string	Yes	First name.
last_name	string	Yes	Last name.
date_of_birth	string	Yes	Date of birth.
address	string	Yes	Address.

Example request

curl -X POST "https://verification.didit.me/v3/database-validation/" \
  -H "x-api-key: YOUR_API_KEY" \
  -F "issuing_state=GBR" \
  -F "services=gbr_kingdom_citizens" \
  -F "first_name=John" \
  -F "last_name=Doe" \
  -F "date_of_birth=1990-01-01" \
  -F "address=123 Sample Street, Sample City, 10001"

Example response (conclusive match)

{
  "request_id": "req_01H...",
  "status": "Approved",
  "issuing_state": "GBR",
  "match_type": "full_match",
  "validations": [
    {
      "outcome_code": "MATCH",
      "service_id": "gbr_kingdom_citizens",
      "service_name": "United Kingdom Citizens",
      "source_data": {
        "address": "123 Sample Street",
        "date_of_birth": "1990-01-01",
        "first_name": "John",
        "last_name": "Doe"
      },
      "validation": {
        "address": "full_match",
        "date_of_birth": "full_match",
        "full_name": "full_match"
      }
    }
  ]
}

Performance and billing

• Latency: typically a couple of seconds.
• Cost: $0.75 per conclusive query. You are billed only on conclusive results — no charge for source downtime, missing fields, or pre-source rejections.
• Reliability: runs on Didit's infrastructure with a 99.9% quarterly uptime target.

Use cases

• Fintech & neobanks — confirm a real, verifiable account holder before opening a wallet or extending credit in United Kingdom.
• Crypto & Web3 — meet VASP onboarding requirements with authoritative-source identity proof.
• Lending — reduce synthetic-identity and first-party fraud with source-verified data.
• Marketplaces & gig platforms — verify users against authoritative data, not just a self-reported form.
• iGaming — satisfy identity and eligibility checks for United Kingdom players with an auditable trail.

How to integrate with Didit

You can run United Kingdom Citizens Verification two ways:

1. No-code workflow. In the Didit Business Console, open the Workflow Builder, add the Database Validation module, select United Kingdom → United Kingdom Citizens Verification, and activate it. Matching users are routed automatically — no engineering required.
2. Direct API. Call the /v3/database-validation/ endpoint shown above with services=gbr_kingdom_citizens. Read match_type and the per-field validation block to drive your approve / review / reject logic.

Every Didit account includes 500 free verifications per month, so you can test the full flow end-to-end before you pay for a single query.

Frequently asked questions

What does the United Kingdom Citizens Verification check confirm?

It validates the submitted data against the official citizenship / civil registry and returns a normalized match result, so you learn whether the citizenship record exists at the authoritative source and which fields matched.

What happens if the source is temporarily unavailable?

You are not charged. Billing applies only to conclusive results — source downtime, missing fields, and pre-source rejections are free.

How fast is the check?

Database validation typically returns in a couple of seconds, so it fits inside a real-time onboarding flow.

Do I need an SDK?

No. The check is a single HTTPS POST to one endpoint. You can also wire it into a no-code workflow in the Business Console.

Ready to get started?

Validate your first United Kingdom citizenship record today.

• Read the API reference: United Kingdom Citizens Verification
• See all database validations: Database Validation pricing & coverage
• Start building: Create a free Didit account — 500 verifications a month, free.