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A reliable partner for years, responsive, efficient, and high-quality.
Ann Sofie Westlake
Head of Marketing, Quartix
Address validation
Address validation API: verify the address and the resident
One wrong digit and the parcel, policy or invoice goes to a stranger. The address validation building block resolves a postcode and house number to the official address, and the person validation on top confirms whether your customer actually lives there.
Available today on quote. Request a demo, no account needed.
9.9MDutch addresses covered
What does the address validation do?
The address lookup takes a postcode and house number and returns the complete, official address: street, city and suffixes. In a signup form that means less typing and no invented or outdated addresses entering your records.
The person validation adds the layer that plain address APIs do not have: it verifies the consumer's identity details against an official source and tells you whether the person signing up is actually registered at that address.
How it works in your flow
Both checks are building blocks you use separately or together.
1. Postcode and house number
The consumer types two fields; the rest of the address is completed and validated automatically.
2. Resident check (optional)
The flow verifies whether the given name is known at that address.
3. Results in your systems
Validated address and match result return over the API and webhooks, ready for your CRM or acceptance process.
Address validation coverage: every Dutch address, by province
Full coverage on Dutch address lookup and person validation today, with 45 countries on the roadmap. Addresses per province:
The lookup itself covers every valid Dutch postcode and house number. Address lookup and person validation in 45 countries are on the roadmap.
GDPR and compliance
Built for lawful consumer checks
Consumer checks touch personal data, so privacy is part of the design. The consumer walks through the check themselves and sees what is being asked. Each step retrieves only what that check needs, from official sources, and every result is recorded.
Official sources and registers, no scraped profiles
Data minimisation: each check reads only the fields it needs
Every result recorded, ready for regulators and audits
DDMA memberDDMA Privacy Seal
Rather check businesses? See the proof. Look up any business in our records, free.
Explore the Company Data APIHow to start checking
From request to production in three steps, with no upfront commitment.
1
Request your API key
Tell us which checks you want to run and roughly how many checks per month.
2
Test the key and receive your quote
Run the checks in the sandbox on your own flow. We send a quote sized to your volume.
3
Production key and go live
Approve the quote, drop in the production key and your first real consumer walks through the flow.
Who is this for?
Anywhere an address is part of acceptance, pricing or delivery.
E-commerce and logistics
No failed deliveries from typos: the address is validated before the order is placed.
Postal and delivery services
Every parcel starts with a valid address. Validate at entry instead of paying for returns.
CRM teams
Keep customer records clean: official addresses instead of free-text fields nobody can mail to.
Call centres
Confirm the address in seconds during the call, with street and city completed automatically.
Customer stories
Teams already building on our APIs
These teams run our business data APIs inside their onboarding and compliance. The consumer checks run on the same infrastructure.
BankID · Digital identity
Live business KYC inside BankID
Norway's national trust mark verifies businesses against the register in real time, cutting verification time by 99%.
Read the story
Cellbunq · KYB
Global KYB compliance on one integration
Up-to-date business details from around the world, screened straight inside the onboarding flow.
Read the story
Zen.com · Fintech
Customer onboarding without the friction
Large-scale KYB verification through business lookup, built straight into the signup path.
Read the story
Sumsub · KYB platform
Verifying the address and the director, at scale
350M statutory addresses and registry director records inside Sumsub's global KYB flows, so shell offices and nominee directors get caught at onboarding.
Read the story
Veriff · Identity verification
UBO checks where the paperwork is hardest
Registry-sourced business and UBO data across Africa, Asia and Latin America, with 80% fewer manual reviews.
Read the storyFree trial
Run your first checks free
- 150 free checks to test with
- Sandbox environment on your own flow
- No credit card needed
Prefer to talk to a person?
Our data specialists help you shape the flow, the volume and the configuration of the checks.
Amsterdam HQVijzelgracht 53D · +31 20 705 2360
BerlinFriedrichstraße 123 · +49 30 21480480
Mon to Fri, 9:00 to 17:30 CET · info@companydata.com
What customers say
Real feedback from the people using CompanyData every day.
★★★★★
The best data company we have worked with.
Helmut Huberti, M.D.
World Arthrosis Org., Heidelberg
★★★★★
Great feedback from our team on the data quality.
Stefania Guerra
Dyson, Milan
Frequently asked questions
Question not listed? Request a demo
How is this different from a regular address API?
The lookup itself is comparable. The difference is the person validation on top, confirming the resident, and the flow integration with the other consumer checks.
Which countries are covered?
The Netherlands today. Address lookup and person validation in 45 countries are on the roadmap and the count keeps growing. Tell us in the demo which markets you need.
Can I use just the address lookup without the resident check?
Yes. Each is its own building block; use the lookup alone in a form, or chain both in an onboarding flow.
How do I integrate it?
Through the hosted onboarding wizard or straight from the REST API inside your own form, with per-step results over the API and webhooks.
Validated addresses in your signup form?
Tell us how many signups or orders you process per month. We will show the address lookup and person validation live and send you a tailored quote.
or call +31 (0)20 705 2360