From 1 February 2027, Greek invoices go out only through a licensed provider.
E-invoicing through a licensed provider is mandatory in Greece from 1 February 2027 for any company issuing invoices from Odoo, an eshop or a group ERP, because that software can no longer send them straight to myDATA, the Greek tax authority's platform. We set up the connection, and your invoices keep coming from the system that issues them today.
1 FEBONLY THROUGHA PROVIDER
- Your softwareOdoo, eshop or ERP
- eInvoice Linkchecks it and keeps the queue
- Providerlicensed by AADE
- myDATAissues the MARK
MARK and QR back on the invoice
THE DATES
- In force
E-invoicing becomes mandatory for the remaining businesses, those with revenue up to €1 million.
- Next
Digital delivery notes, Phase B1: loading and receipt are recorded too.
Last day your software may send invoices straight to myDATA.
Invoices to businesses and the public sector go only through a provider or AADE's own free apps.
HOW AN INVOICE TRAVELS
One invoice, step by step. Use the switch to see what happens when the connection to the provider drops.
- Your software
- eInvoice Link
- Provider
- myDATA
MARK and QR back on the invoice
- You issue the invoice in your software, as on any other day.
- eInvoice Link checks the VAT numbers, VAT and totals before anything leaves.
- The invoice reaches the provider, which signs it.
- The provider doesn't answer. The invoice isn't lost: it waits its turn.
- Another try in a minute, and again in five. Nobody has to do anything.
- The connection is back, and the invoice reaches the provider.
- The provider sends it to myDATA, and the tax authority gives it a MARK number.
- The MARK and the QR code return to your software and print on the invoice.
IS AADE'S FREE APP ENOUGH?
AADE, the Greek tax authority, offers two free apps, timologio and myDATAapp. They work for a handful of invoices a month. When invoices come from software, you need a provider.
AADE's timologio and myDATAapp
- Free.
- Every invoice is typed by hand, on the website or a phone.
- If the invoice already exists in your software, someone types it a second time.
- Fits a company that issues a few invoices a month.
A provider connected to your software
- Invoices leave from the software you already use.
- The MARK number and QR code come back and print on the invoice.
- If the connection drops, nothing is lost.
- Fits anyone who invoices from an ERP or an eshop.
WHY NOT LEAVE IT FOR JANUARY
From 1 February 2027, an invoice sent from your software straight to myDATA, without a provider, counts as not issued. That is how AADE's circular E.2004/2026 puts it.
The penalty is 50% of the transaction's VAT, or €500 to €1,000 per tax audit when the transaction carries no VAT. A connection takes a few weeks to map, build and test with your accountant, and January is when everyone else will be asking.
- Mapwhich system issues what
- Connectyour software to the provider
- Testwith your accountant
- Go livebefore 31 January
CONNECT YOUR ERP TO A PROVIDER, WHATEVER YOU RUN
Odoo
We set the connection up inside Odoo and check the MARK, the QR code, credit notes and every document type, so everything comes out right from day one.
WooCommerce and other eshops
Every order produces its own invoice or receipt, with a VAT-number check when the buyer is a business. Nobody types them in by hand.
Your group's ERP
You don't need to change it. If your ERP has an API or a database we can read, we connect it to the provider through eInvoice Link.
WHAT WE BUILD IT WITH: EINVOICE LINK
eInvoice Link is our own e-invoicing platform. It checks every invoice before it leaves, sends it to the provider and waits until the MARK number is back in your software. If the connection drops, the invoice waits and is sent again on its own. It has an Odoo module, a console where you see every invoice, and twenty written procedures for every case, from cancelling an invoice to a broken connection.
GETS LOSTOUR OWN
PLATFORM
QUESTIONS
Will there be another extension?
As of 2 November 2026, none has been announced for 1 February 2027. AADE moved the dates twice in 2026, by about a month each time, and the last change came one day before the old date. Don't count on it: a connection takes a few weeks. We update this answer with every new decision.
Do we have to replace our ERP?
No. You keep the software you have, and we add the connection to the provider. With Odoo, we set it up inside Odoo. If you are thinking about Odoo for later, see how to keep your ERP now and move to Odoo later.
Are you an e-invoicing provider?
No. Providers are licensed by AADE. We work with licensed providers: we connect your software to one and make sure it keeps working every day.
Which provider should we choose?
AADE publishes the list of licensed provider software. We help you choose based on your software, whether you also issue retail receipts or invoices to the public sector, and price.
What happens if the connection to the provider drops?
The invoice isn't lost. It waits and is sent again as soon as the connection is back. AADE allows one day for the resend, and the system does it on its own. See it in how an invoice travels, with the switch «What if the connection drops?».
Can you work in English with our group's finance team?
Yes. We write proposals, procedures and handover notes in English or Greek, and we talk to your Greek accountant in Greek.
How much does it cost?
It depends on your software and documents. Tell us which software you use and which documents you issue, and we'll put a fixed price in writing. The provider's subscription you agree directly with the provider.
DON'T LEAVE IT FOR THE END OF JANUARY.
Tell us which software issues your invoices, and we'll tell you what your Greek company needs to do.