Invoice retention, evidence and audit trail

Retention is more than saving a PDF. Original format, readability, integrity, structured data, tax decision, corrections, access history and the applicable period should remain linked and reproducible.

Applies to: European Union and named national rules. The outcome depends on the tax point, parties, business status, place of supply and applicable exceptions.Sources checked: 2026-07-14tax-knowledge-2026.07.14

What to verify

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Original document and contractual supply context
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Tax point, amounts, currency and corrections
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Approval, export, retention and audit trail

Practical workflow

1
Capture the decisive facts and select the correct jurisdiction and date.
2
Resolve the time-valid rule and record its source, version and open questions.
3
Align invoice, accounting, reporting and evidence; route uncertainty to review.

Worked example

An invoice is corrected after review and exported. Dynafis links the original hash, change, approval, rule version and final export.

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Common mistakes

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Automation without idempotency and audit evidence
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Correcting only the PDF but not the canonical data
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Treating uncertain extraction as approved tax data

Invoice and accounting impact

The result should be represented consistently in the invoice, structured data, accounting, reporting and evidence. If a decisive fact changes, the decision is recalculated and the previous version remains in the audit trail.

Legal basis and official sources

The page links to official primary sources. The actual decision is made by the versioned Dynafis rule set.

EUR-LexDirective 2006/112/EC – common system of VATEU ↗European CommissionEuropean Commission – eInvoicingEU ↗