With mandatory e-invoicing in Slovakia, it will not be enough to issue an invoice and send it to the customer by e-mail. E-invoices will be sent and received via a digital postman, i.e. a certified delivery service provider.
The digital postman will ensure the secure sending and receiving of e-invoices in the required format. In Slovakia, this process will be built on the Peppol network, to which the company will be connected by its chosen digital postman.
Who is the digital postman?
Digital Postman is a certified delivery service provider through which companies will securely send and receive electronic invoices in the required form. In practice, it connects the company with the delivery infrastructure through which e-invoices reach the business partner and at the same time meets the requirements of Slovak e-invoicing.
The company selects a digital postman from certified providers. The selection is made via the portal of the Financial Administration of the Slovak Republic . The selected digital postman will then ensure the registration of the entity into the Peppol network and technical connection according to the chosen solution. The company can use the service via a connection to an accounting system or ERP, or via a separate web application that the digital postman can offer them. This is especially important for smaller companies that do not need extensive integration.
What happens to the e-invoice after sending?
The digital postman receives the e-invoice from the sender, checks its format and verifies the required data. It also checks whether the invoice can be delivered to the correct recipient.
If the invoice fails validation, the system returns information about the error. The document needs to be corrected and sent again. If it passes the check, the digital postman will ensure its secure transmission, hand it over to the recipient and at the same time ensure the transfer of the required data to the Financial Administration of the Slovak Republic according to the rules of Slovak e-invoicing.
As part of the process, the company also receives a confirmation of delivery, or information that the invoice could not be delivered or processed. Thanks to this, it has an overview of the status of the documents.
GRiT as a digital postman
GRiT will provide companies with the role of a digital postman for mandatory e-invoicing in Slovakia. It will take care of the secure sending and receiving of e-invoices, checking their format, delivering them to the correct recipient and transferring data to the financial administration. The solution also includes a connection to the existing ERP or accounting system, so companies do not have to change the way they work with invoices.
The next step depends on how the company works with invoices today. For smaller companies, a simple application for receiving, issuing and sending e-invoices will suffice. For companies with their own ERP system, the first step is to map out where the invoice data comes from, in what format it is processed and what connection will be most suitable.
The goal is to set up a way of working that matches the size of the company, the volume of invoices, and the current system. A smaller company does not have to deal with complex connections, while a larger organization can integrate e-invoicing directly into the existing document flow.
For companies that already use ORiON EDI from GRiT, the new method of delivering e-invoices can be built on the existing work with structured documents. They already work with structured data today. Mandatory e-invoicing in Slovakia can therefore build on the existing data flow and supplement it only with a new method of delivery via a digital postman.
Start preparing for e-invoicing early
Companies should use 2026 to verify current processes and systems. It is necessary to clarify which obligations will affect the company, where the invoicing data comes from today, whether the ERP system is ready for the change, and how the receipt and possibly sending of e-invoices will be ensured.
Preparation also includes selecting a digital postman and testing the entire process before launching the mandatory regime.
GRiT will help you verify how mandatory e-invoicing will work in your specific setup – from a simple application to ERP connectivity.
Do you need to meet the new legislative requirement for e-invoicing?
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