VAT Invoice Validation for Reclaim
Reclaiming input VAT on a purchase invoice requires the invoice to meet specific formal requirements — a valid VAT registration number, the correct invoice date and reference format, a proper description of goods or services — and an invoice that's missing or has an incorrect detail can have its VAT reclaim rejected by the tax authority even though the underlying purchase was entirely legitimate. AP teams processing invoices for payment rarely have time to also validate VAT-reclaim eligibility line by line, so invalid claims often only get caught during a VAT audit, at which point the business owes back the reclaimed amount plus potentially interest and penalties.
STARTING PRICE
From €299
Standard tier · Multi-step workflow with AI extraction/decisioning and 2-3 integrations.
Get a quote →Saves roughly 2-4 hrs/week plus meaningful reduction in disallowed VAT reclaim risk.
How the automation works
We build a validation check that runs on every vendor invoice as it's processed, confirming it meets the formal requirements for VAT reclaim in your jurisdiction — valid supplier VAT number format and registration status, correct invoice numbering and date, adequate description of what was purchased — and flags invoices that don't qualify before the VAT is claimed rather than after. This catches issues while the invoice is still fresh and the vendor can be asked to reissue a corrected version, instead of discovering the problem during a VAT audit when going back to the vendor for a corrected invoice from months or years earlier is far harder.
Process flow
- 01
Invoice processed for payment trigger
VAT reclaim validation runs automatically as part of normal invoice processing, not as a separate manual check.
- 02
Validate supplier VAT registration ai
The supplier's VAT registration number is checked for valid format and, where possible, current registration status.
- 03
Validate invoice format requirements ai
Invoice date, numbering, description of goods/services and other formal requirements are checked against your jurisdiction's rules for a valid VAT invoice.
- 04
Flag non-qualifying invoices output
Invoices missing a required element are flagged immediately, while there's still time to request a corrected invoice from the vendor before the VAT return period closes.
- 05
Track reclaimable vs. at-risk VAT output
A running total shows confirmed-reclaimable VAT separately from at-risk amounts pending a corrected invoice, so nothing gets claimed on an invoice that wouldn't survive an audit.
Inputs
- Vendor invoices
- Supplier VAT registration data
- Jurisdiction-specific valid-invoice requirements
- VAT return filing period deadlines
Outputs
- Validated reclaimable VAT total
- Non-qualifying invoice flag list
- Vendor correction request log
- VAT reclaim audit-readiness documentation
Works with
Prefer a fully custom build instead of an off-the-shelf integration? We scope both options during your free consultation — most jobs like this one work fine on standard connectors, but higher-volume or non-standard systems sometimes need bespoke API work, reflected in the complex tier.
Where this goes wrong if you get it wrong
- A supplier's VAT registration can lapse or change without your AP team knowing, and reclaiming VAT against an invoice from a supplier whose registration wasn't valid at the time of supply is a common and entirely avoidable audit finding — checking current registration status, not just format validity, is what actually catches this.
- Requirements for what counts as a valid VAT invoice differ by jurisdiction and sometimes by transaction value (simplified invoice rules often apply below a certain threshold) — validation needs to apply the correct rule set for the specific jurisdiction and invoice type, not a single generic checklist.
- Catching a non-qualifying invoice after the VAT return period has already closed limits your options to correcting a filed return rather than simply getting a reissued invoice from the vendor — validation needs to run with enough lead time before the filing deadline to actually request and receive a correction.
- Some purchases have restricted or partial input VAT recovery even with a perfectly valid invoice (certain entertainment expenses, partly-business-use assets) — validation of invoice format doesn't substitute for correctly applying recovery restriction rules, and both checks need to run, not just one.
Frequently asked questions
What makes an invoice invalid for VAT reclaim purposes?
Common issues include a missing or incorrectly formatted supplier VAT number, missing invoice date or reference, an inadequate description of goods or services, or a supplier whose VAT registration had lapsed at the time of supply — the specific requirements vary by jurisdiction.
How does this help if we've already claimed VAT on an invalid invoice?
The goal is catching this before the claim is made, while there's still time to request a corrected invoice from the vendor — this is far easier than correcting a filed return or defending the claim during an audit months or years later.
Does this check the supplier's VAT registration status in real time?
Where a jurisdiction's VAT registry supports it, current registration status is checked, not just the format of the number, since a formally correct but lapsed registration would still disqualify the reclaim.
Does this replace the need for a VAT review during an audit?
No, it reduces the number of invalid claims reaching your VAT return in the first place, which makes any subsequent audit faster and lower-risk, but it doesn't replace your normal audit preparation and review process.