# Participant ID

Identifier used in PEPPOL to address a sender/receiver (e.g., with a scheme).

## Definition

Identifier used in PEPPOL to address a sender/receiver (e.g., with a scheme).

## Explanation

Often written as “scheme:value”, e.g., for VAT or national company IDs.

Used for routing lookups and delivery on the network.

## Related resources

- [PEPPOL guide](/resources/compliance/peppol-network-guide)

## Related terms

- [PEPPOL](/resources/glossary/peppol): A network and specifications for exchanging e-procurement documents, including e-invoices.
- [Access Point](/resources/glossary/access-point): Certified provider that sends/receives PEPPOL documents on your behalf.
- [SMP](/resources/glossary/smp): Service Metadata Publisher used to publish recipient capabilities in PEPPOL.