Document structure
structure 1.1.0
Required identifiers, dates, currency and safe parsing of supported structured invoice syntaxes.
Versioned and source-traceable
Validation rulesets
Every report names the ruleset versions used. Versions can evolve without changing the stable v1 API format.
Controlled code lists
code-lists 2026.08.4
Currency, country, payment, VAT category and document-type values checked against lists pinned by the deployed EN 16931 artefacts.
Authoritative reference: CEN/TC 434 — EN 16931 validation artefacts 1.3.16
Cross-field consistency
consistency 1.3.1
Readiness checks for related dates, currencies, payment details, electronic addresses, VAT exemptions and quantity units.
Authoritative reference: CEN/TC 434 — EN 16931 validation artefacts 1.3.16
Irish VAT invoice readiness
irish-vat-invoice 2026.08.3
Document-verifiable full, simplified and credit-note particulars published by Irish Revenue. Transaction facts outside the document are reported as undetermined.
Authoritative reference: Irish Revenue — VAT invoice information
EN 16931 validation
en16931 1.3.16
Official CEN/TC 434 Schematron validation artefacts applied to supported UBL and CII XML.
Peppol BIS Billing validation
peppol-bis-billing 3.0.21
Official Peppol BIS Billing 3.0.21 document rules for selected or detected UBL invoices and credit notes; transport is not included.
Authoritative reference: OpenPeppol — Peppol BIS Billing 3.0.21
Peppol BIS Self-Billing validation
peppol-self-billing 3.0.2
Official Peppol BIS Self-Billing 3.0.2 rules for UBL self-billed invoices and credit notes.
Authoritative reference: OpenPeppol — Peppol BIS Self-Billing 3.0.2
Peppol workflow readiness
peppol-workflow 2026.08.1
Content-safe Invoice Response and SBDH document checks; no network delivery is performed.
Authoritative reference: OpenPeppol — Invoice Response and enveloping specifications
Ireland VAT Modernisation readiness
ireland-modernisation 2026.08
Published Irish eInvoicing direction; unpublished technical details remain pending.
EU cross-border VAT readiness
eu-cross-border-vat-readiness 2026.08.1
Document evidence for explicitly identified intra-Community supplies; external evidence remains outside-document.
Authoritative reference: Irish Revenue — zero rate on intra-Community supplies
Invoice arithmetic
arithmetic 1.2.0
Exact-decimal consistency checks for line calculations, adjustments, VAT breakdowns, totals, prepayments, rounding and amount due.
Authoritative reference: CEN/TC 434 — EN 16931 validation artefacts 1.3.16
Explore the rule catalogue, evidence register or machine-readable rulesets to see exactly what each version checks.