UBL Validator
Validator
🇨🇿 Validate UBL Invoices for Czech Republic
UBLB2G MandatoryPeppol
UBL 2.1 is required for B2G in Czech Republic. Czech Republic has a B2G-only e-invoicing mandate with no plans for mandatory B2B.
Quick Facts
Format
UBL 2.1
Standard
EN 16931
Mandate
B2G Only
Peppol
Connected
What We Validate
UBL 2.1 XML schema validation
EN 16931 business rules
Namespace and element structure
Code list validation
Party and address structure
Tax calculation rules
Invoice line consistency
Common UBL Errors
Czech Republic E-Invoicing Requirements
Phase
Status
Scope
B2G receiving
Live (Apr 2020)
All public sector entities must accept e-invoices
VAT Control Statement
Live (Jan 2016)
All VAT-registered businesses (monthly)
Required CIUSISDOC 5.2+ (national Czech format) or EN 16931
Government portalNEN (Národní elektronický nástroj)
PeppolYes — Peppol BIS 3.0 accepted alongside ISDOC
NEN platform. B2G suppliers can optionally submit through NEN, which accepts ISDOC (Czech national format), UBL 2.1, EDIFACT, and Peppol BIS 3.0. Suppliers are not required to issue e-invoices — the obligation is only on public authorities to accept them.
FAQ
What is UBL 2.1?
UBL (Universal Business Language) 2.1 is an open XML standard for business documents developed by OASIS. It defines schemas for invoices, orders, and 60+ other document types.
Is UBL the same as Peppol?
No. UBL is the document format; Peppol is the network. Peppol BIS Billing is built on UBL 2.1 with additional business rules.
Should I use UBL or CII for EN 16931?
Both are valid syntaxes for EN 16931. UBL is more common internationally (Peppol uses it), while CII is used in hybrid formats like ZUGFeRD.
What are cbc: and cac: prefixes?
These are UBL namespace prefixes. cbc: (Common Basic Components) contains simple values, cac: (Common Aggregate Components) contains complex structures.
Which standards are built on UBL?
Peppol BIS Billing 3.0, XRechnung (UBL variant), A-NZ PEPPOL (Australia/New Zealand), and Singapore InvoiceNow all use UBL 2.1 as their base syntax. Our validator checks generic UBL compliance—use format-specific validators for additional business rules.
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