The Clearance Model
Mandatory e-invoicing in Europe, read at document level
An invoice has to be provable, not merely sent. The VAT directive requires that its authenticity of origin, the integrity of its content and its legibility are assured from the moment of issue until the end of the retention period, and it lets each business choose how. Electronic seals and qualified signatures are one route, a documented business control linking the invoice to the underlying supply is another, and several national mandates now effectively pick the route for you. This section covers the three properties and what evidence actually demonstrates them, the eIDAS trust services involved, what a compliant archive has to preserve alongside the document itself, how long each Member State expects you to keep it, and where data protection obligations cut across the whole arrangement.
The VAT Directive requires three properties of an invoice to be assured from issue to the end of retention, and leaves the method to you. What each one asserts is the point.
The analysis underneath the anchor piece.
The obligation is to retain the invoice. Once it is a structured file, a stored PDF rendering does not discharge that, and the list of what to keep alongside it is long.
Once a document has been cleared or reported it exists in someone else's records. Which correction mechanism is available, and what each asserts, decides where the tax lands.
A signature is made by a person and a seal by an organisation, and the tiers between them buy assurance about identity rather than better cryptography. What they cost is not the certificate.
A mandate obliges you to create, transmit and retain data that identifies people. Data protection law obliges you to have a basis for each act and to stop when it runs out.
Penalty regimes attached to invoicing mandates come in a small number of shapes, and the shape decides where remediation money should go. It matters far more than the headline figure.
The VAT Directive leaves the retention period to each Member State, and the tax rule is rarely the longest obligation attached to the same document. Work out the rule, not the number.
Most businesses assure their invoices through business controls and could not describe how if asked. The route is free to adopt and expensive to evidence.