TaxisNet and the κλειδάριθμος — your master login to the Greek state

What it is

When you obtain an AFM, you also receive an Authentication Key (κλειδάριθμος). You use it once to activate your TaxisNet credentials — the login that unlocks AADE tax services and a wide range of gov.gr public services. The AFM application is simultaneously the κλειδάριθμος application.

Why it matters for your money

TaxisNet credentials are the master login. They (or your web-banking codes) are what open Gov.gr Wallet, EFKA, the Personal Number platform, and your annual tax filing. Whoever controls your κλειδάριθμος can act for you across the state — which is exactly why it must be protected like a bank password.

How to get it

It comes with the AFM. If you already have an AFM but no credentials, you can often obtain a κλειδάριθμος online by proving ownership of your mobile number through your bank or mobile provider, then entering your ID details, IBAN, email and carrier. Otherwise you collect it at a tax office (ΔΟΥ).

Register your mobile in ΕΜΕπ

many services (the Wallet, the Personal Number) require your phone number to be verified in the National Communication Registry (ΕΜΕπ / EMEp). Doing this early removes a common blocker later.

How not to get cheated

no official body will ever phone, text or email you asking for your κλειδάριθμος, TaxisNet password, or an OTP code. Anyone who does is running a scam. Treat these credentials like cash: don’t share them, don’t enter them on links sent to you, and change the password if you suspect exposure.

Related

AFM (tax number) · Gov.gr Wallet · protecting your tax number and identity · first IDs, in order

This is general information, not legal or tax advice. The credential steps above reflect official practice as of 2026 — confirm current requirements at aade.gr, kleidarithmos.gov.gr or gov.gr. WTP Finance is informational only.