All your Peppol questions answered

FAQ Peppol

When switching to Peppol, a lot of questions come up. We answer the most frequently asked questions on this page. Do you still have a question of your own? Do not hesitate to contact us.

How do I use this FAQ?

Click on one of the categories on the left and you will immediately see all the questions, and answers, related to that topic.

  • The legal retention period for invoices, including electronic invoices, is 10 years in Belgium. Digital invoices must be stored digitally.
    On Doccle, they remain safely stored for as long as you don’t delete them yourself.

  • A Peppol ID is a unique identification number that identifies organisations within the Peppol network.
    This ID allows businesses to safely send and receive e-invoices.

  • Peppol stands for “Pan-European Public Procurement Online”. It is a standardized network for exchanging business documents electronically, such as invoices, with trading partners across Europe and beyond.

    The use of Peppol will become mandatory in the future.

  • A Peppol invoice is a structured e-invoice exchanged through the Peppol network.
    It is not a PDF, but a standardized digital file, such as the UBL format.

    UBL (Universal Business Language) is the required format for sending invoices via Peppol.

  • The Peppol network is a standardized and international network used for exchanging electronic documents, such as electronic invoices, which will become mandatory as of 1 January 2026.

  • The Peppol format is a standardized digital file (UBL) that makes e-invoices automatically readable and processable in any accounting software that supports Peppol.

  • If you have any questions about e-invoicing or Peppol, you can visit the Doccle Help Center.
    If you don’t find the answer to your question there, you can contact us directly via this link.

  • The government’s goal is to encourage businesses to digitize their administration. By introducing mandatory e-invoicing, the invoicing process between companies subject to VAT and between companies and the government can be digitized.
    This legislation also provides better visibility on VAT obligations and ensures improved tax monitoring.

  • From 2026, invoices between businesses and the government must be sent electronically. The Peppol network (Pan European Public Procurement OnLine) has been chosen as the channel for electronic invoicing.
    By standardizing the e-invoicing format, invoices can be automatically processed by any accounting software.

  • As a self-employed professional, you are not required to work with an accountant, but you are legally obliged to keep accurate accounts.
    Even after 2026, you won’t be required to collaborate with an accountant.
    However, registration on Peppol will be mandatory for sending business invoices.

    Doccle can help you with this by collecting all your incoming invoices in one secure place.
    Sending invoices will also soon be possible via Doccle, while keeping your current way of creating invoices (even if that’s in Excel or Word, for example).

  • You can add clients by filling out our registration form. An overview of all the steps you need to take as an accountant can be found on this page.

    Register Peppol for your clients
  • Doccle can automatically send invoices to accounting software, provided there is an email address available to receive them.

    Fully compatible with:
    Octopus, Dexxter, Silvasoft, Wings, Winbooks, AFAS, Accountable, Sage Cloud Demat, Billit, Billtobox, Okioki, Clearfacts, Lucy.

    Also possible for software using folders or platforms:
    Yuki & Exact Online.

  • As an accountant, you decide how incoming and outgoing Peppol documents are delivered to you:

    • Automatic forwarding: invoices are sent directly to your accounting software or email address.
    • Manual retrieval: log in to the account and download invoices whenever you choose.
    • Integration with Codabox/Voila: all documents are automatically imported into your accounting system without any extra action.
  • There are several ways Peppol invoices can be forwarded to your accountant:

    • Automatic forwarding: invoices are sent directly to the accounting software or email address.
    • Manual forwarding: log in to your account and download the invoices whenever you want.
    • Integration with Codabox/Voila: all documents are automatically transferred to the accounting system, without any extra action.
    • Receiving invoices via Peppol? → Free in Doccle. (For example, for non-VAT-liable companies.)
    • Sending invoices via Peppol? → €4/month, billed annually, with no limit on the number of invoices sent.
    • For accountants? → No costs associated with your clients using Doccle.
  • Invoices can be forwarded automatically, allowing you to receive the documents right away,
    just like with the Codabox/Voila integration.

    But you can also download the documents yourself, whenever you want.

    • Automatic forwarding: invoices are sent directly to your accounting software or email address.
    • Manual retrieval: log in to the account and download invoices whenever you choose.
    • Integration with Codabox/Voila: all documents are automatically imported into your accounting system without any extra action.
  • It’s useful to centralize your administration in Doccle. Thanks to Peppol integration in Doccle, you can store all your incoming and outgoing invoices securely in one place. You can also upload payment receipts and cash register tickets. This makes VAT declarations much easier since all your documents are in one central location.

  • You can only register your company once to receive invoices through Peppol .If your company is already registered to receive your peppol invoices through your pre-accounting of invoicing package, you cannot register through Doccle.

    If you still prefer to receive your invoices via Doccle for free, you can cancel your registration in your pre-accounting package and start a new registration in Doccle.

  • The Share with Accountant feature in Doccle automatically sends invoices received in the format in which they arrived. The feature can forward all common formats such as pdf, word, excel and even xml and UBL. We send both PDF and UBL to the accountant.

  • Doccle is your gathering place to store and automatically forward all relevant documents. By registering your company on Peppol through Doccle, all your incoming invoices will automatically arrive in your Doccle account.

    You can use the ‘Share with bookkeeper’ feature to automatically send these invoices to your bookkeeper or accounting package. More info on ‘sharing with your bookkeeper’ can be found via the link below.

    How do I share my documents with my accountant
  • As a self-employed person, you are not required to work with an accountant. But keeping correct accounts is required by law. Even after 2026, you are not obliged to cooperate with an accountant. However, registration on Peppol is mandatory for sending company invoices.

    Doccle can help you with this and collects all your incoming invoices in a secure place. Sending invoices will soon be possible via Doccle as well, where you can keep your way of preparing invoices (even if this is via excel or word, for example).

  • Yes, you can. You can easily add an extra company (or multiple companies) under a single account, as long as you are the owner of the company.

    There is no additional cost for this. If you activate DocclePro, you only need to do this once, and it will apply to every company within your account.

  • If you don’t mind having your private and business documents mixed, you can activate Peppol in your existing account without any issue.
    Otherwise, it’s best to create a separate account for your business.

    Since Peppol registration is done via itsme, you’ll need to move it under your settings, in the “Security” section.

    Alternatively, you can follow this procedure if you wish to register without itsme.

  • You only need 1 account for both. So a separate account as a self-employed person is not necessary. By the way, you can split your private and business by working with categories.

  • If your customer is not registered on Peppol, you will receive a notification when sending the invoice via Doccle. In this case, the invoice will be sent by email to ensure it reaches your customer.

  • When you send an invoice via Doccle, Doccle checks, based on the company number (KBO), whether your customer is already registered on Peppol. If not, you will receive a notification, and the invoice will automatically be sent via email.

  • This is not absolutely necessary, but is of course always allowed.

  • In the Doccle application, you get a notification if a customer is not yet registered on Peppol.

  • Best to request this yourself from the supplier. For example, via email or by giving them a call.

  • There is no standard procedure for this. It is best to inform your customers yourself that you will be sending your invoices via Peppol from now on.

  • There is no standard procedure for this. It is best to contact your supplier yourself to ask to receive your invoices through Peppol.

  • Best to inform your suppliers yourself that you are registered on Peppol.

  • You can find an overview of all required details via this link. When you upload an invoice, Doccle automatically detects the invoice data and fills it in according to the structured Peppol format.

    To the overview
  • A Peppol invoice that has already been sent cannot be modified.If you want to correct an error, you must first issue a credit note to cancel the original invoice, and then send a new, corrected invoice.

  • No, this is not required. Peppol invoices do not need a digital signature.

  • Yes. With DocclePro, you can include attachments, but they must be combined with the invoice into a single PDF file.

  • To send a credit note via Peppol, create it in your invoicing software, just like an e-invoice.
    Always refer to the original invoice, use a negative amount, and include the reason for the correction.

    With Doccle, you can create your credit note just as you normally would. Doccle will then convert it into the correct Peppol format for sending.

  • With Peppol, invoices can only be sent in the UBL format, which is the universal standard for e-invoices. If you already have an invoice in another format (Word, PDF, Excel, …), you can upload it to Doccle.

    Doccle will then convert it into UBL format and send it via Peppol. This means you can keep your current way of creating invoices.

  • To send invoices via Peppol, you need an invoicing tool that supports the Peppol format. You can, for example, do this through Doccle.

  • Self-billing is also possible through Peppol, provided that:

    • both parties have given their prior consent;

    • the supplier or service provider formally approves each invoice through an acceptance procedure.

    A self-billing invoice is created in the same way as an e-invoice, but must include an additional note stating that the invoice was issued by the customer. At Doccle, we are working hard to provide this.

  • For now, there isn’t one. If your company plans to send a large number of invoices, we recommend using our omnichannel solution.

    Contact our sales team for more info.

  • Electronic invoices are sent in UBL format, which is not easily readable for customers. That’s why Doccle always attaches a PDF version of the invoice, ensuring that your customer can read it properly.

  • To send invoices via Peppol, they must be formatted in the standardized UBL format. This allows e-invoicing to be processed automatically, from machine to machine or from one software system to another.

  • Today, invoices are often created in Word, Excel, or PDF, but these formats cannot be sent via Peppol. To send invoices through Peppol, they must be in the standardized UBL format so that they can be read by an accounting system.

    With Doccle, you create your invoice as usual in Word, Excel, or an accounting software. You then upload this as a PDF in Doccle. Doccle automatically converts it into the UBL format and sends it via Peppol. A PDF version of the original invoice is also attached. Uploading as ULB is not yet possible.

  • Invoices prepared in other programs, can be uploaded as PDF. So you can also create them via Word or Excel, but should save them as PDF. And then converted to the mandatory UBL format.

    For the time being, it is not yet possible to create invoices directly in Doccle or to load self-written invoices.

  • At Peppol, you can only send via UBL format. This is the European standard for e-invoices. An existing invoice via another format (word, pdf, excel, …) can be converted to UBL within Doccle and sent via Peppol from mid-2025. So you can keep your current way of formatting invoices.

  • If you are not a Belgian VAT liable company, you do not have to register via Peppol. However, it can be convenient to do so, so that you can receive all your invoices in one place. With Doccle, you can do this for free.

  • Registering on Peppol and receiving invoices is free. Sending invoices, which will be available soon, will require a small fee.

    The standard price to send invoices via Doccle is 4€ per month, billed annually. There is no limit on the number of invoices to be sent.

  • As a company, you have to register anyway because you have to receive your invoices via peppol. In addition, you have to send invoices via peppol to other companies and governments via peppol.

    This will be possible with Doccle from spring. Nothing will change for your private customers.

  • Don’t worry. This is completely normal. The system used to send documents via Peppol asks the sender to provide a company number when sending.
    It then searches the database for the Peppol ID that contains this company number.

    However, some senders may not have the recipient’s company number and will look up the business in the Peppol database using the VAT number instead.
    Thanks to these two registrations, senders can always find a company in the database, whether they use the company number or the VAT number.

  • If you want to switch providers, you must first deregister with your current provider.
    After that, you can register through your new provider.

    Keep in mind that it’s possible to use multiple providers for sending e-invoices, but receiving invoices can only be done through one provider.

  • When you switch providers, your existing invoices — both received and sent — remain with you or in your accounting software.
    Ask your new provider to coordinate the transition in advance to avoid any interruption in receiving invoices.

  • At the moment, this is not yet possible. You can only register your company if you are the official representative (via itsme). We are currently working on a solution to make this possible. However, you can already share your Peppol connection with someone else so that they also receive the documents.

  • For receiving invoices, you can only register with one provider. However, for sending invoices, multiple registrations are possible.

  • You can only be directed to the Peppol network for receipt of invoices via 1 application. If you are already registered elsewhere, please contact this application to cancel the registration.

  • Don’t have a Doccle account yet? Then create one first. Once you have an account, you can add Peppol yourself via the map on the home page or via the “Connections” menu. And then follow the next steps.

    Create your free account

Got a question about Peppol yourself?

If so, send an email to community@doccle.be.