In one of the most rapidly modernizing digital economies in the Mediterranean, a precise understanding of Greece’s Tax Identification Number (TIN) — the AFM (Arithmos Forologikou Mitrou) — is essential for corporate compliance, KYB checks, and navigating the 2026 transition to mandatory B2B e-invoicing. Governed by the Independent Authority for Public Revenue (AADE), the Greek tax landscape is shifting toward full transparency through the myDATA platform, making real-time validation a mission-critical requirement for any business operating in the region.
Having a single trusted resource that answers every key question in one place makes all the difference between smooth operations and costly administrative friction, such as blocked tax deductions or penalties for non-compliance. This FAQ blog delivers clear, complete answers to the 10 most essential questions about Greek TINs — from definition and formats to the 2026 digital mandates.
Businesses that make the smart choice to use TaxDo’s GTL (Global TIN Lookup) connect instantly to official Greek national registries, complete every check in one click, and eliminate manual errors—ensuring fast, accurate, and fully compliant Tax ID verification for tax, onboarding, customs, and regulatory reporting purposes.
10 Essential Questions About TIN in Greece
Common Questions
1. What is a TIN in Greece?
In Greece, the Tax Identification Number is universally known as the AFM (Αριθμός Φορολογικού Μητρώου).
The AFM is a unique 9-digit identifier assigned to every individual, legal entity, and business operating in Greece. It serves as the master key for all fiscal interactions, including filing income tax, opening bank accounts, and registering property. For businesses, the AFM also forms the basis of their VAT identity within the European Union.
2. What types of TIN numbers exist?
3. What is the format of the TIN?
4. Which authority issues the TIN?
5. Who needs to register for a TIN? (2026 Update)
6. How to register for a TIN (AFM) in Greece?
7. How to verify a TIN in Greece?
8. How TaxDo Helps Companies with TIN Compliance in Greece?
9. What are the uses of TIN for businesses in Greece?
10. What happens if a TIN is incorrect or missing?
Conclusion
Greece is entering a new era of digital tax enforcement where the AFM is the digital fingerprint of every business transaction. A valid AFM proves an entity exists, but real-time verification through myDATA is what ensures your business can actually trade.
TaxDo provides the critical automation layer needed to navigate Greece's high-stakes 2026 e-invoicing environment. By integrating TaxDo’s GTL and GSV solutions, you eliminate the risks of manual errors and ensure your Greek operations are 100% compliant with AADE mandates. Don't risk blocked e-invoices or customs delays—automate your Greek tax ID verification with TaxDo today.