The Benefits of ApiCheck's Address Validation for Your Business

Whether you run a webshop, manage a CRM, or process customer data — address validation is the simplest way to prevent data quality problems before they cost you money.

What Is Address Validation?

Address validation is the process by which an entered address (street name, house number, postal code, city) is checked against an official address registry. A valid address exists in the registry and is correctly spelled. An invalid address is flagged so the user can correct it.

How Can ApiCheck Help?

ApiCheck offers address validation for the Netherlands, Belgium, and 15+ other European countries via one API key. The API works as follows:

Netherlands: Postal code + house number → unique address. The lookup is based on the BAG (Basisregistratie Adressen en Gebouwen).

Belgium: Postal code alone is not unique. ApiCheck offers an autosuggest system: the user types the street name and the API filters in real time based on postal code. This way, a correct Belgian address is entered without a central lookup.

How Does Address Validation Work with ApiCheck?

ApiCheck uses multiple validation methods:

1. Postal code check — does the postal code match the given house number?
2. Street name check — does the street name exist in the given municipality?
3. Spelling check — is the street name spelled correctly?

Invalid addresses are flagged. The user receives an error message and the opportunity to correct it.

Why Address Validation Is Indispensable

• Every returned package costs €10–25 in extra costs
• Incorrect customer data worsens marketing results
• Manual corrections after entry cost more than prevention upfront
• Customers expect a smooth checkout — extra typing = more drop-offs

How Address Validation Increases Efficiency

With address validation at the source:

• Errors are prevented before being saved to your system
• The customer fills in fewer fields (only postal code + house number)
• You always have up-to-date, correct addresses in your database

Frequently Asked Questions

Which countries does ApiCheck work for? The Netherlands, Belgium, Luxembourg, France, Germany, Czech Republic, Finland, Italy, Norway, Poland, Portugal, Romania, Spain, Switzerland, Austria, Denmark, the UK, and Sweden.

Is ApiCheck GDPR-compliant? Yes. ApiCheck does not store personal data. Address lookups are not logged.

Can I try the API for free? Yes, new accounts receive 200 free credits. No credit card required.