The business number
The unique identification number from the ARBK certificate. You enter it in the company's details in Portofol.
PortoSEF · Fiscalisation (SEF)
PortoSEF: the fiscal receipt, straight from Portofol.
ATK's Electronic Fiscalisation System (SEF) requires every sale to a final consumer to carry a receipt that is signed and reported in real time. Portofol does this itself, from the till, from the restaurant and from the invoice, without a fiscal cash register.
How it works
A fiscal receipt, without a fiscal cash register.
Every sale to a final consumer gets a signed receipt and is reported to ATK at once, as AI (MF) 01/2026 requires. From the till, the restaurant or the invoice.
- Register the point of saleWith the business number and the fiscalisation number from EDI. The key is created on our server and never leaves it; ATK signs the certificate.
- Sell as usualThe receipt is signed and sent to ATK at once; ATK returns the transaction number.
- QR for the citizenThe receipt prints the QR code the citizen scans with ATK's app, and the verification number (NUIKF).
- Cancellation and returnCancellation and return receipts refer to the original receipt, per ATK's protocol.
No internet? The receipt is kept with its QR code and re-sent to ATK with one click when the connection returns.
Tested against ATK's test service · SEF certification by ATK in progress
What you need
Three things, and the till is ready.
The fiscalisation number
From ATK's EDI: Fiscalisation → Request for fiscalisation. One number per point of sale.
A receipt printer
Any 80 mm thermal printer, or the office printer. No fiscal device is needed.
Questions
About fiscalisation.
Who has to issue a fiscal receipt?
Businesses that sell to the final consumer: shops, markets, cafés, restaurants, services. Under AI (MF) 01/2026 every such sale gets a fiscal receipt reported to ATK.
Do I need a fiscal cash register?
No. The receipt is issued by the app and signed with the certificate ATK gives the point of sale. To print it, an 80 mm thermal printer or an ordinary printer is enough.
Where is the signing key kept?
The key is created on Portofol's server during registration and stored encrypted; it is never downloaded and never leaves the server. ATK only signs the certificate.
What happens when there is no internet?
The sale is saved and the receipt keeps its QR code, marked as not sent. When the connection returns you re-send it to ATK with one click.
How are returns and cancellations done?
Today's receipt is cancelled with a cancellation receipt; goods returned later get a return receipt. Both refer to the original receipt, the goods go back to stock and the books update themselves.
Is Portofol certified by ATK?
The integration has been tested against ATK's test service: point-of-sale registration, sale, QR code, return and cancellation. SEF certification by ATK is in progress; until then the test environment is used.
Sales with a receipt, from today.
Register the point of sale in a few minutes, then sell as usual.