Peppol, customer data and API
Peppol integration
Send your invoices and credit notes as e-invoices via the Peppol network.
Since 1 January 2026, e-invoicing via Peppol has been mandatory between Belgian businesses. Read how sending and receiving via Peppol works in NumNum under Peppol e-invoicing.
NumNum is a certified Peppol Access Point provider. You send invoices and credit notes as e-invoices straight to your customer, and purchase invoices arrive in your inbox as data. For every customer you can see whether they can receive e-invoices.
What it gives you
- No sign-up neededWe arrange your connection and your Peppol address.
- Purchase invoices as dataYou don't retype the supplier, amounts or VAT.
- Proof for every invoiceA sending and receiving log.
Try it with your own accountant and bank.
Create a free account and send your first invoice. Software not listed? Build your own integration with the API and webhooks, or get in touch.