How do I fix PEPPOL-EN16931-R121 (Peppol BIS 3.0 Rule R121) automatically?

Normalize UBL 2.1 headers, EAS schemeID attributes, currency attributes, and line calculations to satisfy PEPPOL-EN16931-R121. You can upload your rejected XML or PDF invoice in the workbench on this page and click "1-Click Auto-Fix All Errors" to repair PEPPOL-EN16931-R121 immediately.

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🇧🇪 Peppol BIS Billing 3.0 • SEVERITY: FATAL • Peppol BIS 3.0 Rule R121

How to Fix PEPPOL-EN16931-R121: Peppol BIS 3.0 Rule R121

OpenPeppol Access Point rejected your UBL 2.1 document under rule PEPPOL-EN16931-R121. Common in Belgian B2B (2026 mandate), Dutch Peppol/Simplerinvoicing, and UK NHS Peppol submissions.

📐 Official Schematron Specification & XPath Diagnosis for PEPPOL-EN16931-R121

PEPPOL-EN16931-R121 — BLOCKING REJECTION

Official Specification Rule

[PEPPOL-EN16931-R121] OpenPeppol BIS Billing 3.0 Schematron constraint R121.

XPath: /ubl:Invoice

Deterministic Remediation (How to Fix)

Normalize UBL 2.1 headers, EAS schemeID attributes, currency attributes, and line calculations to satisfy PEPPOL-EN16931-R121.

❌ REJECTED XML STRUCTURE (TRIGGERS PEPPOL-EN16931-R121)

<!-- Rejected by Peppol BIS 3.0 Schematron: PEPPOL-EN16931-R121 -->

✅ COMPLIANT XML STRUCTURE (PEPPOL-EN16931-R121 FIXED)

<!-- Verified Peppol BIS Billing 3.0 UBL 2.1 (PEPPOL-EN16931-R121 PASS) -->

⚡ Repair PEPPOL-EN16931-R121 in Your Invoice Right Now:

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🛠️ محرر الإصلاح التلقائي

1. Document Header & Routing Identifiers XRECHNUNG 3.0.2

Invoice No BT-1

Issue Date BT-2

Due Date BT-9 / BR-DE-26

Buyer Ref / Leitweg-ID BT-10 / BR-DE-15

Currency & ZATCA UUID BT-5 / KSA-1

2. Seller Party & Mandatory Contact (BG-4 / BG-6 / BR-DE-2) BT-27 .. BT-43

Seller Legal Name BT-27

Seller VAT / 15-Digit ZATCA TIN BT-31 / BR-KSA-08

Contact Person BT-41 / BR-DE-5

Contact Phone BT-42 / BR-DE-6

Contact Email BT-43 / BR-DE-7

Seller EndpointID BT-34 / R020

Building # (ZATCA) KSA-17

SEPA Payee IBAN BT-84 / BR-DE-23

3. Buyer Party & Peppol Endpoint (BG-7 / R010) BT-44 .. BT-55

Buyer Legal Name BT-44

Buyer VAT ID BT-48

Buyer EndpointID BT-49 / R010

4. Line Items & EN 16931 Mathematical Reconciliation (BR-CO-10 .. 16) BG-25 / BG-22

Net Total BT-109 / BR-CO-13

VAT Total BT-110 / BR-S-09

Payable Gross BT-112 / BR-CO-15

🛡️ تقرير مطابقة قواعد ZATCA / EN 16931

AUDITING...

UTF-8 • OASIS UBL 2.1 / EN 16931

Related Peppol BIS Billing 3.0 Validation Rules

PEPPOL-EN16931-R001

BT-23 (Business Process Type / ProfileID)

[PEPPOL-EN16931-R001] Business process MUST be provided (cbc:ProfileID).

Fix PEPPOL-EN16931-R001 →

PEPPOL-EN16931-R008

All XML Elements (Empty Tag Prohibition)

[PEPPOL-EN16931-R008] Document MUST NOT contain empty elements.

Fix PEPPOL-EN16931-R008 →

PEPPOL-EN16931-R010

BT-49 (Buyer Electronic Address / EndpointID)

[PEPPOL-EN16931-R010] Buyer electronic address (cbc:EndpointID with @schemeID) MUST be provided.

Fix PEPPOL-EN16931-R010 →

PEPPOL-EN16931-R020

BT-34 (Seller Electronic Address / EndpointID)

[PEPPOL-EN16931-R020] Seller electronic address (cbc:EndpointID with @schemeID) MUST be provided.

Fix PEPPOL-EN16931-R020 →

PEPPOL-EN16931-R120

BT-131 (Invoice Line Net Amount Calculation)

[PEPPOL-EN16931-R120] Invoice line net amount MUST equal (Invoiced quantity * (Item net price / item price base quantity) + Sum of invoice line charge amount - sum of invoice line allowance amount).

Fix PEPPOL-EN16931-R120 →

PEPPOL-EN16931-R002