With SUF, you can download invoices from the e-invoice system or manually enter invoices into the system and store them electronically, with the ability to view the original invoice in PDF format. However, the SUF system is only available to users of public funds. SUF registration is possible on the state platform.

Introducing e-Invoicing revolutionizes the way you do business. Although electronic invoices are legally recognized just like paper invoices, there are significant advantages and cost reductions related to delivery and processing methods. E-Invoices online is an API for exchanging and storing e-invoices. It combines all the advantages of SEF and SUF into one easy-to-use solution.

What is SUF?

For the needs of public funds users, the Office for Information Technology and the Government Service have created the software solution SUF.

SUF is a system for receiving, storing, confirming, and preparing incoming invoices, which should enable the receipt and management of received invoices from suppliers.

• SUF is a web platform that allows the receipt of e-invoices or manual entry of invoices if the invoice is delivered in paper form.
• Through SUF registration, you can save, confirm, search, and prepare for sending only incoming invoices received from suppliers.

SUF allows manual entry of invoices into the e-invoicing system and downloading invoices. It also allows you to store invoices electronically with the option to view the original invoice in PDF format.

SUF is a system located in the State Information Center. It offers the most advanced options for managing invoices, confirming, reviewing, and automatically booking incoming invoices. It also gives users of public funds the option to create countless unique user accounts with different access levels.

The Electronic Invoicing System SEF is an information technology solution managed by the central information intermediary through which electronic invoices are sent, received, registered, processed, and stored.

The e-invoice system SEF is intended for all subjects of the public sector, private sector subjects, and voluntary users, including flat-rate taxpayers, agricultural households, and individuals.

Advantages of Using API in the Serbian e-Invoicing System

By using the API, you only need one program to manage everything included in the SEF and SUF systems. API is a specialized business interface that provides information and data transfer services from the sender to the recipient, applying security, information, and certification standards.

The API allows integration of e-invoice sending services into most accounting programs - ERPs, ensuring fast and secure e-invoice exchange.

Read more about the invoice program here.

Frequently Asked Questions about SUF

• How do you register in SUF?

A demo version of SUF is available, which means that SUF registration is possible using a username and password. Registration will later be possible in two different ways:

• With a qualified electronic certificate
• With two-factor authentication

• How do we enter invoices into SUF?

Invoices in SUF can be entered manually, i.e., by typing and attaching a scanned original invoice. Another way is to automatically upload invoices to SUF through the E-invoice portal (SEF).

• Does SUF connect to the electronic invoicing platform?

The e-invoice system is a portal that, according to the Electronic Invoicing Law, will have to be used by both the public and private sectors. SUF is only available to users of public funds.

For all technical details, situations, and general information related to e-invoices, please review the list of frequently asked questions and answers.