PEPPOL End-to-End Workflow

Let’s walk through how Pre-Award, Post-Award, e-Delivery, and the CTC Model fit into the overall PEPPOL architecture and workflow — using a visual-style explanation of the PEPPOL end-to-end process.

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🔄 PEPPOL End-to-End Workflow (Conceptual View)

   [Buyer]                         [Seller]
     |                                |
     |--1. Pre-Award----------------->|   ← Tendering, RFQs, Pre-award catalogues
     |                                |
     |<-- Responds -------------------|   ← Bids, Quotes
     |                                |
     |== Contract Awarded ============|
     |                                |
     |--2. Post-Award---------------->|   ← eOrder (PEPPOL BIS Order)
     |                                |
     |<-- Order Response -------------|   ← Accept/Reject/Change order
     |                                |
     |<-- Despatch Advice ------------|   ← Shipping details
     |                                |
     |<-- Invoice --------------------|   ← eInvoice (PEPPOL BIS Invoice)
     |                                |
     |-- Invoice Response (optional)->|   ← Accept/Dispute
     |                                |

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🌐 PEPPOL e-Delivery (Behind the Scenes)

All the above documents flow via PEPPOL Access Points through a standardized 4-corner model:

[Seller System]
     ↓
[Access Point 1] -- AS4 Protocol --> [Access Point 2]
     ↓                                     ↓
[PEPPOL SMP/SML]                     [Buyer System]

• Access Points: Providers certified to send/receive PEPPOL documents.

• SMP: Directory service to find recipient capabilities.

• SML: Routes the messages based on recipient PEPPOL ID.

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🔒 CTC Model in PEPPOL (When Tax Authorities are Involved)

In countries with mandatory e-invoicing and real-time tax reporting, PEPPOL supports the CTC (Continuous Transaction Controls) model:

[Supplier ERP]
     ↓
[PEPPOL Access Point]
     ↓
[Tax Authority Portal / Clearance System]  ← Validation, archiving, e-signing
     ↓
[PEPPOL Access Point]
     ↓
[Buyer ERP]

• E-invoice is first validated/approved by the tax authority.

• Only after that, it is delivered to the buyer.

Countries exploring or implementing CTC + PEPPOL:

• Italy (FatturaPA)

• France (2026 planned)

• Poland, Greece, etc.

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🚀 Summary: Where Everything Fits

Stage	Key Docs	Infrastructure Used	CTC Role
Pre-Award	Tender, Quote, Pre-Award Catalogue	Access Points, SMP	Not applicable
Post-Award	Order, Invoice, Despatch, Credit Note	Access Points, SMP/SML, AS4	If invoice → routed via tax portal
e-Delivery	Applies to all document transport	4-corner model, AS4, SMP/SML	Enables compliant, secure exchange
CTC Model	Invoice or Credit Note only	PEPPOL + National Tax Systems	Mandatory validation/archival

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• Let me know what direction you want to explore!