Free Digital Mailbox for E-Invoices

An e-invoice is an invoice in structured XML format (EN16931, UBL) that your accounting software processes automatically. Unlike PDFs or scanned invoices, it contains machine-readable data — no manual data entry, reduced error risk.

Per Act No. 222/2004 Coll. on VAT (§ 85o), from January 1, 2027, all VAT payers must send and receive e-invoices for domestic B2B and B2G transactions. This applies to every legal entity and entrepreneur — freelancers, LLCs, lawyers, architects, and property lessors. The transition period runs from January 1, 2026. International e-invoicing (ViDA) is planned from 2030.

You choose a digital mailbox provider from the market. You don’t need expensive accounting software — just create an account with a digital mailbox provider and use their web or mobile app to send and receive invoices.

Yes, receiving e-invoices is and always will be free. No limits, no time restrictions. You only pay if you also want to send — and even that starts at €0 (5 free invoices per month).

Penalties can reach up to €10,000 for unreported or incorrect data, or for missing the deadline. Repeat violations can go up to €100,000. If you make an honest mistake and correct it promptly, no fine applies. If you can prove your digital mailbox provider failed, you are also not penalized.

Peppol is a European network for secure exchange of electronic documents between businesses (B2B) and public institutions (B2G). In Slovakia, the Peppol Authority is the Financial Directorate of the Slovak Republic, responsible for accrediting service providers (Access Points) and managing national rules.

No. If your software supports Peppol, just connect it to a digital mailbox provider. If not, you can create invoices directly in ePošťák or through our API. No specific software is required — just a digital mailbox provider.