# Guides

Step-by-step guides for integrating with the Seqino PDP API.

Introduction
Core concepts: Sponsors, Clients, Mandates, and how they interact with the PPF.

Creating clients and mandates
Register a client and create mandates covering all four directory entry types: SIREN, SIREN + suffix, SIRET, and SIRET + routing code.

Mandates and Peppol addresses
Understand how AIFE/PPF mandate types map to Peppol electronic addresses (scheme 0225), and how to set the correct fields in UBL and CII invoices.