When you connect Payhawk to an eInvoicing network like Peppol or the French PPF, your company is registered with a participant network identifier. Suppliers use this identifier to send you structured eInvoices directly.
Identifier sources and suffixes
Your eInvoicing identifier is derived from your company's VAT number. The French authorities use the SIREN.
A suffix creates a separate addressing line on the same base identifier. You only need a suffix if you route specific invoices to a separate system, typically when another provider retains the plain identifier.
If all your invoices flow into Payhawk, use the plain identifier with no suffix. Suppliers can then resolve your address automatically without you needing to share it. In Payhawk, the suffix is optional and defaults to payhawk.
Moving from another provider to Payhawk
A Peppol participant network ID can only be registered with one access point for receiving at a time. If another provider currently holds your ID, you must ask them to deregister your receiving capability before you can register in Payhawk.
Registering an alternative identifier, such as an IBAN or GLN in Peppol, or a suffix in PPF, while another provider keeps your default registration number usually causes issues. Suppliers' systems typically send to the default VAT-registered ID, which leads to split invoice streams, missed invoices, and unnecessary supplier communication. Deregistering with the previous provider so Payhawk can capture your default ID is the most reliable approach.
KSeF in Poland is an exception. Multiple systems can listen to the same feed, and there are no participant IDs in the Peppol sense.
Multiple identifiers and multi-entity accounts
Each legal entity must register its own identifier. Payhawk does not support multiple Peppol IDs for a single entity or account. Multiple IDs are only necessary when invoices must be routed to different systems, which is not required when all invoices flow into Payhawk.
If a company is registered in one country with a branch in another, each entity uses its own identifier. Only French entities can be registered to the French PPF. A non-French entity cannot register for the PPF, even if it has a French branch with a SIREN and French VAT.
Receiving and sending are separate
Payhawk only manages the accounts payable (receiving) scope for your identifier. Your company can still register the same identifier with a different provider for accounts receivable (sending). These scopes are independent, so registering with Payhawk will not block your existing invoicing or accounts receivable services.
Disconnecting the integration
When you disconnect the integration, your Peppol ID is removed immediately. In France, changes to the Annuaire (directory) typically propagate within 24 hours.
Supplier identifier schemes
Your company is only reachable under the specific schemes you have registered. For example, the French PPF uses the SIREN scheme (0225), while many other Peppol countries use VAT-based schemes. If a supplier uses a different scheme, the invoice will not reach you.
To verify which scheme and access point are registered for any company, use the Peppol Directory.