About

As of 01/01/2026, electronic invoicing via Peppol becomes mandatory in Belgium for B2B invoices (between VAT-liable companies).

Invoices sent to private individuals (B2C), such as a caterer issuing an invoice for a private event, are not subject to this obligation and may (for now) still be sent via PDF/email or paper invoice.

In short:

✔️ Mandatory via Peppol: invoices between Belgian VAT-liable companies (B2B) as from 01/01/2026
❌ Not mandatory via Peppol: invoices to private individuals (B2C)

Conditions for automatic Peppol processing

You are actively using the Invoice module on MyTrivec.

For an invoice to be automatically sent via Peppol, all of the following conditions must be met:

• The invoice is B2B (VAT-liable company to VAT-liable company)

• A valid VAT number is added to the customer in Domino

• An email address is added to the customer in Domino

• The organisation the invoice is addressed to is registered on Peppol

If one of these conditions is not met, the invoice will not correctly be processed via Peppol. You will see an error message from Peppol in MyTrivec.

Invoice processing via Peppol

Once a VAT number and email address are added to a B2B customer in Domino, invoices will be automatically sent via MyTrivec and Scrada to Peppol, provided all conditions are met.

• Processing by Peppol can take up to 48 hours

• The status can be tracked in MyTrivec via the Peppol State view

If the invoice is successfully sent, a confirmation will be visible in MyTrivec.

Setting up Domino for Peppol

Editing accounts in the Backoffice

1. Go to Backoffice → Sales → Accounts.

2. Click Load All Accounts to retrieve all customers.

3. Edit a B2B customer by clicking the pencil icon.

4. Add:

   • The VAT number

   • The email address

These fields are mandatory for Peppol invoicing.

Editing accounts in the Frontoffice

You can also edit customer accounts via the POS:

1. Go to Frontoffice (Cash) → Customer.

2. Search for the customer.

3. Edit the account and add:

   • VAT number (correct format)

   • Email address

VAT number format (important)

The VAT number must be entered in the exact correct format, otherwise the invoice will not be sent to Peppol.

Correct format

BE0897334231

Incorrect formats

• BE 0897.334.231

• BE0897.334.231

Rules:

• No spaces

• No dots

• Country code + numbers only

Only invoices with a VAT number in this exact format will be sent to Peppol.
If the format is incorrect, an error message will be shown in mytrivec.

If the VAT number was not yet correct on the account in Domino, you still have the opportunity to adjust the recipient's details on the invoice itself on mytrivec. When you open the invoice, you can use the EDIT button to enter the correct VAT number format before manually resending the invoice to Peppol. Via the new Peppol Tab on the invoice. (managing)

Peppol status in MyTrivec

MyTrivec provides a dedicated view that allows you to track the Peppol status of invoices created via the POS.

This view shows whether an invoice:

• Has been sent to Peppol

• Was successfully delivered

• Encountered an error

Managing Peppol

When opening an invoice in MyTrivec, a new “Peppol” tab is available next to Invoice Details.

Via this tab you can:

• Verify whether the invoice was successfully sent to Peppol or returns with an error

• Download the UBL file for verification

Invoice Delivered

Delivery Failed

Important notes on follow-up

• The only requirement to send an invoice from MyTrivec to Peppol is:

  • A valid VAT number

  • An email address

  • A Peppol-registered recipient

• Further follow-up of B2B Peppol invoices happens in the Peppol portal, not in MyTrivec

• B2C invoices should continue to be followed up in MyTrivec as usual

• In MyTrivec, you can only verify whether an invoice was successfully sent to Peppol or returns with an error, and resend manually if necessary, after correcting the VAT number format if it was not yet correct in the till

• Payment follow-up can still be done manually in MyTrivec if required

Troubleshooting Peppol

This article helps you troubleshoot common issues when sending invoices via Peppol using Domino and MyTrivec. Use this guide if invoices are not sent, remain in a pending state, or show an error.

Invoice is not sent to Peppol at all

Possible causes

• The invoice is B2C (private individual)

• The customer is missing a VAT number

• The VAT number format is incorrect

• The customer is missing an email address

• The recipient organisation is not registered on Peppol

What to check

1. Confirm the invoice is B2B.

2. Open the customer account in Domino.

3. Verify that:

   • VAT number is filled in

   • Email address is filled in

4. Verify that the recipient organisation is registered on Peppol.

5. Check that invoicing is enabled on the licence.

VAT number error

Symptoms

• Error message shown in MyTrivec

• Invoice remains in error state

Correct VAT number format

BE0897334231

Common mistakes

• Spaces in the VAT number

• Dots in the VAT number

• Wrong country format

Incorrect examples:

• BE 0897.334.231

• BE0897.334.231

Solution

• Remove all spaces and dots

• Use country code + numbers only

• Save the customer and resend the invoice if required

Invoice stuck in “Pending” or “Processing” state

Explanation

Peppol processing is not instant.
It can take up to 48 hours before the final status is returned.

What to do

• Wait up to 48 hours

• Check the Peppol State view in MyTrivec

• Do not resend the invoice during processing

Invoice sent but not received by customer

Possible causes

• Recipient is not correctly registered on Peppol

• Recipient Peppol endpoint is inactive

• Recipient system rejected the invoice

What to check

• Confirm with the customer that they are Peppol registered

• Ask the customer to check their Peppol inbox or ERP system

• Verify the Peppol status in MyTrivec

Further investigation must be done via the Peppol portal, not MyTrivec.

Invoice shows “Error” in Peppol State

Common reasons

• Invalid VAT number

• Missing mandatory fields

• Recipient not registered on Peppol

What to do

1. Open the invoice in MyTrivec.

2. Go to the Peppol tab.

3. Review the error message.

4. Correct the issue in Domino if possible.

5. Follow up via the Peppol portal if needed.

Can I resend a Peppol invoice?

Important

Once an invoice has been successfully sent to Peppol, it cannot be modified or resent.

Correct approach

• Create a credit note

• Create a new corrected invoice

This follows Belgian invoicing legislation.

Where should I follow up Peppol invoices?

• MyTrivec

  • Verify if the invoice was sent successfully

  • Download the UBL file

• Peppol portal

  • Full invoice lifecycle

  • Delivery confirmation

  • Rejections or acceptance by recipient

B2C invoices should continue to be followed up in MyTrivec as usual.

When to contact support

Contact Trivec Support if:

• The invoice is not sent despite correct configuration

• The Peppol State shows technical errors

• The Peppol tab is missing unexpectedly

Provide:

• Invoice number

• Customer VAT number

• Screenshot of Peppol State

• Error message (if available)