Compliance
myDATA for restaurants, in plain language
This page explains what a restaurant owner needs to know about electronic documents — without legalese and without a sales pitch.
myDATA is the Greek tax authority's electronic platform, to which a business's documents are transmitted. For a restaurant it means every receipt must be issued and transmitted electronically, receive a unique registration number (MARK) and carry the details that allow it to be verified. In Makker, issuing always happens server-side through a certified provider — never from the till's browser — and the MARK, UID and QR are stored beside the sale.
We are not accountants and this page is not tax advice. What exactly applies to your business is your accountant's call — here we explain how Makker works and what to check.
What a receipt must carry
A correctly transmitted retail receipt carries the unique registration number (MARK), the document identifier (UID) and a QR that leads to its verification, together with the business details, the breakdown per VAT rate and the total. In Makker these are not fields a cashier fills in: they are produced by the provider and printed automatically.
Why issuing happens only server-side
A document should never be issued from a browser. A browser can close, lose connectivity, run on a compromised machine, or execute the same action twice. In Makker the till requests issuing and the server performs it, with a lock so the same sale cannot be transmitted twice, and stores the response beside the sale. That is both a compliance rule and a security rule.
One table, one document
In a Greek dining room the bill is split constantly: three by card, two in cash, one paying only for what they ate. Splitting is a payments matter, not a documents matter. Makker closes the table with a single document however many payments settled it, because that is correct accounting and because it means the same evening is not charged four times.
What happens when the internet drops
The till and kitchen slip printing continue: orders and cash payments go into a local queue and sync as soon as the line returns. Issuing documents and card payments do need connectivity — no system can transmit to a service that is unreachable. Makker shows you clearly what is pending and sends it as soon as it can, rather than pretending everything is fine.
Card payments and the terminal
The payment amount travels from Makker to your terminal. Nobody retypes it, so nobody mistypes it — and matching the transaction to the sale does not rest on the cashier's memory at the end of the night.
What to check with every vendor
Ask four things and ask to see them live: who the certified provider is, where issuing happens (server or machine), what exactly works without internet, and how you get your documents if you leave. If any answer is vague, ask for it in writing.
FAQ
What people ask before they start
Do I need a cash register, or is Makker enough?
Makker issues and transmits documents electronically through a certified AADE provider and prints them on a thermal printer. Whether and what kind of fiscal device your activity requires is your accountant's call — bring us their answer and we will tell you exactly how it is set up.
What is MARK?
The unique registration number the tax authority assigns to each transmitted document. Makker stores it beside the sale and prints it on the receipt together with the verification QR.
Can I cancel a receipt?
Cancellation happens with the prescribed document, not by deletion. Makker keeps both, so the history stays complete and auditable.
Who can see my data?
Each business's data is isolated at the database level and hosted on European Union infrastructure in Frankfurt. We use it for nothing else and you can export it whenever you want.
What about platform orders?
They are treated like any other sale: the document is issued server-side through the provider, with the correct VAT rate per item.