Official Tax ID Lookup & Verification

A TIN lookup checks a tax identification number — a VAT number, a GST registration, an EIN or any national tax ID — against the official source that issued it, and confirms that it exists, is currently active, and belongs to the declared holder. That is different from syntax validation, which only checks that a number obeys the format, structure and check-digit rules published for its jurisdiction and therefore tells you the number could exist. TaxDo returns official lookups in 130+ countries in real time, with syntax validation extending coverage to 210+ countries and 1,000+ TIN types.

Syntax validation checks that a number obeys the format, structure and check-digit rules published for that jurisdiction. It tells you the number could exist. Official lookup queries an official source in real time and confirms the TIN exists, is currently active, and belongs to the declared holder. Where a regulation asks you to satisfy yourself that a TIN is reasonable, it is describing the second, not the first.

Directly. Every result is returned in real time from an official, authorized source at the moment of the request. We do not resell an aggregated third-party database and we do not serve stored results, which is why a number deregistered yesterday comes back inactive today rather than after somebody's refresh cycle.

130+ countries, across every major region: 40+ in Europe, 30+ in Asia-Pacific, 30+ across the Middle East and Africa, and 20+ in the Americas. Syntax validation extends coverage to 210+ countries and 1,000+ TIN types, so every country in your portfolio returns a structured result. Contact us for the current position on your specific jurisdictions.

Whether the TIN is valid in format and check-digit, whether it was found in the official source, its current status, the registered holder name, the entity type, the registration status and date, and the exact time of the query. A signed Certificate of Validation is issued for the audit file. Field availability varies with what each jurisdiction publishes.

Syntax validation covers both individual and business TIN types. Official Global TIN Lookup is primarily available for business and entity tax ID validation across supported countries; individual, personal tax ID validation via official sources is available in select countries only. Tell us which jurisdictions matter to you and we will confirm coverage.

Structured results and a complete audit trail aligned to global tax-transparency requirements, plus a signed, timestamped Certificate of Validation for every successful official lookup. Together they let you reconstruct exactly what was known at the moment a decision was made, which is the standard an auditor actually applies.

Each regime requires the reporting entity to obtain a Tax Identification Number and to test that it is reasonable. Pattern-matching alone does not satisfy that in most transpositions. Official lookup produces a defensible record of what was checked, against what kind of source, when, and what came back. We track how each regime is transposed jurisdiction by jurisdiction so your checks stay aligned as the rules land.

Yes. Batch validation has no limit on the number of uploads and each upload processes up to 50,000 tax ID validations depending on your subscription, which is built for portfolio remediation. Scheduled re-validation then detects deregistration, expiry or revocation across your portfolio, keeping compliance accurate over time.

A valid VAT number has to pass two tests. First the format: every country publishes a structure and, in most cases, a check-digit rule, so a mistyped or invented number can be caught instantly. Second, and the one that matters, whether the number is actually registered and still active with the authority that issued it. TaxDo runs both in a single call across 130+ countries and returns the registered holder name so you can confirm the number belongs to the business you are dealing with, not merely that it exists.

They are the same idea under different names. A Tax Identification Number is the generic term for the number a tax authority assigns to a taxpayer. In Europe a business trading cross-border usually has a VAT registration number; in the United States a business has an EIN; India issues a GSTIN, Australia an ABN, the Gulf states a TRN, Brazil a CNPJ. Each has its own format and its own issuing authority. One TaxDo call handles 1,000+ of these types across 210+ countries and returns them in one structured format.

Do not proceed on it. Depending on where you are in the lifecycle that means charging tax rather than applying an exemption, holding the invoice rather than issuing it, or pausing a payment rather than releasing it. Then go back to the counterparty for the correct number. An invalid result is not always fraud, and often it is a typo, a number issued but not yet activated for cross-border trade, or a registration that lapsed. The value is knowing before the money moves, rather than after.

Three common reasons. The registration may be genuine domestically but not yet enabled for cross-border trade, which some countries treat as a separate step. The registration may be very new and not yet published. Or the number may have been deregistered since you last saw it. Because we query the source live rather than a periodic copy, a not-found result reflects the position now, which is what a control or an auditor is actually asking about.

Several authorities publish a free single-number lookup, and they are useful for a one-off check. They become impractical the moment you need to verify at scale, inside a workflow, across many countries, with a record of what was checked and when. TaxDo exists for that case: one API and one dashboard covering 130+ countries, batch validation, scheduled re-checks, and an evidence trail for every result.

At minimum before any event that depends on it: a payment run, an invoice, a filing. Beyond that, scheduled re-validation across the whole base is the practical answer, because counterparties deregister and restructure without telling you. Most organizations run a quarterly cycle over the full master and a live check at payment.

Yes. Batch validation has no limit on the number of uploads and each upload processes up to 50,000 tax IDs depending on your subscription, which is built for cleaning an existing master rather than checking one record at a time. You get a structured result per row and can then schedule ongoing re-validation so the file does not go stale again.

Yes, and earlier than most teams expect. Structured e-invoicing regimes such as Peppol, SDI and SII check the counterparty tax ID when the invoice is cleared, and reject it if the number is invalid or no longer registered. Because the rejection happens at clearance rather than at drafting, the first you hear of it is usually a failed submission and a delayed payment. Validating the counterparty number before issuance removes that failure mode entirely, and the same call gives you the evidence for the tax treatment you applied.

Enterprise data residency is available across 35 regions, so validation data is processed and hosted only within the jurisdiction you select. All data is encrypted in transit and at rest. As an optional, client-enabled setting, TIN data can be automatically deleted after validation so that no TIN information is retained in the system.