As of 3 July 2026, Tezga eKasa is an officially approved ESIR - an electronic invoicing system approved for use by the Ministry of Finance - Tax Administration, decision no. 000-092-00-00123/2026-0000. The register was assigned identification number ID 1597, which now appears on every issued receipt.
What ESIR approval actually is
Under Serbia's Fiscalisation Act, a taxpayer may only use a register (ESIR) approved by the Tax Administration. Approval is no formality: the register goes through a technical review (every receipt element is checked - from the QR code and tax labels to advance invoices and CRF registration) and an administrative review, and only then receives a decision and an ID number.
What the Tax Administration verified
- All receipt types: sale, advance, copy, proforma, training - both sale and refund
- Accuracy of every receipt element (all 17 checklist items of the approval report)
- The verification QR code and the link to the fiscalisation management system
- Advance invoices and closing of the advance chain
- e-Invoices and registration in the Central Invoice Registry (CRF)
What it means for you in practice
When you ring up a sale in Tezga, the receipt is fiscalised with the Tax Administration in real time - the customer can verify it immediately by scanning the QR code. You don't have to think about regulations: the register has been verified to produce receipts exactly as the law requires. And since the approval is transferable, any taxpayer can legally use Tezga - flat-rate entrepreneur, sole trader or LLC.
Key takeaways
- Ministry of Finance - Tax Administration decision no. 000-092-00-00123/2026-0000 of 3 July 2026
- ID 1597 on every receipt - proof you are using an approved register
- "Advanced" classification: all receipt types, including advances
- Every receipt verifiable via QR code at suf.purs.gov.rs
Frequently asked questions
Every approved ESIR has an ID number in the Tax Administration's public registry, and Tezga receipts show "ESIR no.: 1597/1.1". Verify any receipt by scanning its QR code.
No - the Fiscalisation Act only allows elements approved by the Tax Administration. The ID number is the first thing to ask any register vendor.
That the supplier (Go Simple) may provide the register to any fiscalisation taxpayer - not only for its own use.
What you get with Tezga eKasa
- Approved by the Ministry of Finance - Tax Administration (decision no. 000-092-00-00123/2026-0000)
- ESIR identification number: ID 1597, version 1.1
- "Advanced" classification - all receipt types, including advances
- Transferable approval - any taxpayer can legally use the register
Read more
The simplest fiscal cash register in Serbia: type a sentence, get a receipt → e-Invoicing in Serbia 2026: who must comply, deadlines, and how → The KPO book for flat-rate entrepreneurs: what it is, the 6M limit, how to keep it →Try Tezga eKasa free
Fiscal receipts and e-invoices for service businesses - a register that keeps it simple.
Korisni vodiči za male firme - jednom mesečno, bez spama.