What It Does

Automatically sends invoices and credit notes via Peppol when Belgian B2B clients pay. Documents arrive directly in client's accounting software. No PDF emails, no manual processing.

Features

• Auto-send invoices via Peppol on payment
• Auto-send credit notes via Peppol on refund
• Billit API integration (certified Peppol Access Point)
• Auto-detects eligible clients (Belgium + valid VAT number)
• Non-eligible clients continue receiving normal emails
• Client area Peppol delivery status page
• Admin dashboard with statistics
• Retry failed deliveries
• Filter by status (sent/pending/failed)
• Separate tabs for invoices and credit notes
• Optional: suppress default invoice emails for Peppol clients
• Connection test button
• Configurable VAT percentage
• Test mode for sandbox testing
• 3 languages included (EN, NL, FR)

Requirements

• WHMCS 8.9+
• PHP 7.4+
• Billit account with API access (billit.be)

Setup

1. Extract to /modules/addons/peppol_billit/
2. Go to Setup → Addon Modules
3. Activate "Peppol Billit"
4. Enter license key
5. Enter Billit API key
6. Test connection
7. Done

How It Works

Belgian B2B client pays → Module checks eligibility (BE + VAT) → Sends to Billit API → Billit converts to UBL → Transmits via Peppol → Client receives in accounting software → Confirmation email sent

Eligibility

Module only processes clients who are:

• Located in Belgium (country = BE)
• Have valid Belgian VAT number (BE + 10 digits in tax_id)

All other clients continue receiving normal WHMCS invoice emails.

Email Templates

Creates two templates on activation:

• "Peppol Invoice Delivered"
• "Peppol Credit Note Delivered"

Customize in Setup → Email Templates → Invoice.

Why Billit?

Peppol requires a certified Access Point. Billit is a Belgian accounting platform that handles UBL conversion and Peppol transmission. You need a Billit account separately.