Important update to the Tax Authorities Fiscalization System: new mandatory data introduced

The Tax Authorities Fiscalization System has been updated to require the operator’s personal identification number (OIB) as a mandatory element in B2B transactions, in addition to B2C. This change applies to fiscalization messages for e-invoices and eReport submissions, with updated technical documentation and WSDL files provided to support compliance and enhance transparency.

The Tax Authorities Fiscalization System has been updated in line with the provisions of the Fiscalization Act. A new mandatory data element, the personal identification number (OIB) of the operator, has now been introduced.

Since the operator’s personal identification number (OIB) is already a mandatory element in B2C (end consumer transactions), from now on, the operator’s personal identification number (OIB) is now mandatory for B2B.

This information is now an integral part of:

• fiscalization messages for both incoming and outgoing e-invoices,

• eReport messages are used for recording invoices where an eInvoice has not been issued.

To support this change, the technical documentation and WSDL files have been updated and are now available under the Fiscalization 2.0 and eInvoice sections.

The update aims to further strengthen transparency and traceability in electronic invoicing and reporting processes, ensuring smoother compliance for taxpayers.