UBL Validator
Validator
🇱🇹 Validate UBL Invoices for Lithuania
UBLB2G MandatoryPeppol
UBL 2.1 is required for B2G in Lithuania. Lithuania has mandatory B2G e-invoicing since July 2017 via the SABIS platform (which replaced eSąskaita in July 2024).
Quick Facts
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
Lithuania E-Invoicing Requirements
Phase
Status
Scope
B2G
Live (Jul 2017)
All public contracting authorities
SABIS (verbal contracts)
Live (Jan 2025)
All verbal contract invoices must go through SABIS
Required CIUSPeppol BIS Billing 3.0 (primary for B2G)
Government portalSABIS (General Account Administration Information System)
PeppolYes — connected to Peppol since April 2019
SABIS platform. The SABIS platform replaced eSąskaita in July 2024 and serves as the centralized B2G hub. Submission methods include manual entry via portal, API integration, or Peppol network via Access Point providers. EN 16931 compliant formats are required. Lithuania also uses the i.MAS system (i.SAF, i.VAZ, i.SAF-T) for broader tax reporting.
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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