Serbia’s e-invoicing mandate, in place since 2022 for B2G transactions and extended to all B2B and B2C taxpayers in 2023, continues to evolve as the Ministry of Finance strengthens the national SEF (System for Electronic Invoicing). The framework is designed to improve fiscal transparency, streamline VAT reporting, and align with EU standards, with regular updates ensuring that taxpayers and service providers comply with the latest requirements.
On August 15, 2025, the Ministry released details of SEF version 3.14.0, which introduces several functional and validation improvements. Among the most significant are the mandatory inclusion of a delivery date on all invoices, stricter rules preventing transaction or payment dates from exceeding the issue date, and reinforced VAT consistency checks for categories S10 and S20. In addition, foreign currency invoices now display total increase and reduction amounts more clearly, while documents generated in the test environment are automatically watermarked.
From a technical perspective, the update also adds a new API method that allows users to retrieve an extended dataset of incoming invoices within a defined period, as well as improvements in document referencing and validation. Users can now send notifications of previous tax input through SEF, while error messages and system behaviors have been refined to reduce ambiguity. SEF 3.14.0 is currently available in the DEMO environment, giving businesses time to adapt before full production rollout.
