EN 16931 Validator
Validator
š¬š· Validate EN 16931 Invoices for Greece
EN 16931PlannedPeppol
EN 16931 is planned in Greece. Greece is implementing mandatory B2B e-invoicing from February 2026 in phases ā large businesses (>ā¬1M revenue) first, then all businesses from October 2026.
Quick Facts
What We Validate
EN 16931 semantic model compliance
Business rule validation (BR-xx rules)
VAT category rules (BR-S, BR-Z, BR-E, etc.)
Calculation rules (BR-CO-xx)
Code list validation
Party identification
Cross-border requirements
Common EN 16931 Errors
Greece E-Invoicing Requirements
Phase
Status
Scope
myDATA reporting
Live (Jul 2021)
All businesses (mandatory)
B2G
Live (Sep 2025)
All public contracts
B2B Phase A
Live (Feb 2026)
Large businesses (>ā¬1M revenue in 2023)
B2B Phase B
Oct 2026
All remaining businesses
Validation enginemyDATA (clearance platform with MARK/UID assignment)
Required CIUSEN 16931 compliant myDATA XML
Government portalmyDATA (aade.gr/mydata)
PeppolYes ā Peppol used for B2G delivery to KED
myDATA clearance workflow. Invoices are submitted to myDATA for validation, receive a unique MARK/UID, then are delivered via certified providers or the free Timologio app. QR codes on PDFs must link to the myDATA record. Tax incentives are available for companies adopting e-invoicing 2 months before the deadline: 100% equipment depreciation in purchase year and 100% deduction on e-invoice costs for the first 12 months.
FAQ
What is EN 16931?
EN 16931 is the European standard for electronic invoicing. It defines a semantic data model and business rules that all EU e-invoices must follow, regardless of syntax (UBL or CII).
Is EN 16931 mandatory?
For B2G invoices to EU public sector, yes. For B2B, it depends on the country. Under ViDA (VAT in the Digital Age), EN 16931 compliance will become essential across the EU.
What syntax should I use for EN 16931?
EN 16931 supports two syntaxes: UBL 2.1 and UN/CEFACT CII. UBL is more common for Peppol; CII is used in ZUGFeRD/Factur-X. Both express the same data.
What's a CIUS?
A CIUS (Core Invoice Usage Specification) is a national adaptation of EN 16931. Examples: XRechnung (Germany), Peppol BIS (international), CIUS-RO (Romania).
How do I prepare for ViDA?
Start by ensuring your invoices comply with EN 16931. Our validator checks all the business rules that will be required under the ViDA e-invoicing mandate.
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ZUGFeRD Validator
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