Netherlands
How to verify a Dutch company (KVK): the KVK number, the free KVK search, the UBO register and VIES.
Belgium
How to verify a Belgian company (KBO/CBE): the enterprise number and its check digits, KBO Public Search and VIES.
Lead validation
To check the companies on a sales list before outreach, see Lead Verify and how it compares with contact-data tools. Other tools are on the comparisons page.
Try it
Test the shape of a check with a free sandbox key (no wallet, mock data); run it for real per call with USDC (x402) or an API key: see the pricing page and the quickstart. Free real checks come with a Limitguard account: sign up and your first 5 lead checks are free. No card needed.
