What happens if my e-invoice fails validation?

Rejection Means the Invoice Was Never Issued

Across every EU government portal — Italy's SDI, Poland's KSeF, France's PPF — a rejected e-invoice is legally treated as not having been issued. The recipient cannot use it for VAT deduction, the supplier's books are incomplete, and the transaction remains unrecorded until a corrected invoice passes validation. According to Invoice Navigator's processing data, roughly 8–12% of first-time e-invoice submissions fail validation when businesses lack pre-submission checks.

Country-Specific Consequences

Italy (SDI)

When Italy's SDI rejects an invoice, it sends a "Ricevuta di scarto" (rejection notification) to the sender. The business has 5 calendar days to correct the errors and resubmit. If the correction is not made within 5 days, the invoice is considered late-issued, and penalties ranging from EUR 250 to EUR 2,000 per invoice may apply. For format violations, fines can reach 90–180% of the VAT amount on the invoice.

Poland (KSeF)

KSeF will not assign an invoice number to a document that fails validation — the invoice simply does not exist in the system. Common KSeF rejections include line-item totals that do not match summary totals, missing mandatory fields (such as the invoice date in P_1 or VAT number in Entity1), and inconsistencies between goods/services items and VAT calculations. During 2026, Poland has a grace period with no financial penalties, but from January 2027 non-compliance fines can reach up to 100% of the VAT amount shown on the invoice.

France (PPF)

Under France's 2026 mandate, invoices that fail validation on a certified PDP or the public PPF portal must be corrected before they carry legal weight. The penalty for issuing a non-compliant e-invoice is EUR 50 per document, capped at EUR 15,000 per year.

Common Validation Errors

Based on Invoice Navigator's analysis of validation failures across thousands of European invoices, the most frequent errors are:

• Calculation mismatches — Line-item totals do not sum to the invoice total, or VAT amounts are inconsistent with the stated rate
• Missing mandatory fields — Buyer/seller tax IDs, Leitweg-ID (Germany), payment information, or invoice dates
• Invalid code values — Tax category codes, payment means codes, or country codes that do not match the accepted code lists
• Schema violations — Malformed XML, incorrect namespaces, or wrong schema version
• Attachment issues — Invalid MIME codes, oversized embedded files, or missing required attachments

How to Prevent and Recover from Rejections

The most reliable approach is pre-validation: checking every invoice against the full ruleset before submitting to the government portal. Invoice Navigator's validation API checks invoices against 1,300+ rules (schema, EN 16931, and country-specific CIUS) in under 500ms. The auto-remediation engine fixes structural errors — such as missing scheme IDs, incorrect date formats, and malformed MIME codes — while preserving all financial fields. For businesses already dealing with rejected invoices, the correction workflow is: retrieve the rejection notification, identify the error codes, fix the underlying data, re-validate, and resubmit.