From 1 January 2027, domestic B2B and B2G invoices in Slovakia must run as e-invoices over Peppol. eConnect is a PASR-certified Access Point and supports Peppol BIS Billing 3.0 (Bisv3), TDD SK for domestic reporting, and MLS.
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Slovakia is the first EU country to run a national B2B mandate fully via Peppol-CTC. For domestic transactions, invoice exchange and tax reporting run in parallel over the Peppol network.
The invoice travels from supplier to buyer via two Access Points. Only for domestic transactions do C2 and C3 send a TDD SK to Finančná správa at the same time. That is parallel reporting, not clearance: the tax authority does not approve the invoice first. MLS confirms invoice delivery and also comes back from the tax authority after TDD processing.
Technical background
Domestic invoicing or receiving under the B2B/B2G mandate, including TDD SK.
Domestic SK flows via a Slovak entity. Onboarding and testing can start in 2026.
NL→SK is a Peppol invoice. Reporting to Finančná správa is domestic only.
The TDD SK mandate is domestic. From the Netherlands to Slovakia you send a regular Peppol invoice. Extra-EU export and import have no Peppol documents in this framework.
eConnect is on List 1 of Finančná správa (EFSK). OpenPeppol alone is not enough for Slovak SMP registrations.
Production-ready Peppol BIS Billing 3.0, TDD SK on domestic traffic, MLS from C3 and from C5.
Internal ISDOC? eConnect transforms to Bisv3. Connect via API or ERP and scale towards ViDA (2030).
One partner for the Slovak mandate: PASR accreditation, Bisv3 and domestic TDD SK reporting to Finančná správa are already in place.
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From 1 January 2027 for all domestic B2B and B2G transactions. In 2026, organisations can voluntarily onboard and test with the Finančná správa platform.
For domestic transactions a TDD SK runs in parallel with the Peppol invoice to Finančná správa. That is the first fully Peppol-based CTC mandate in the EU. Reporting to the tax authority applies to domestic traffic only, not to intra-EU.
Yes. eConnect routes Peppol BIS Billing 3.0 to Slovak recipients. TDD SK reporting follows only for domestic SK transactions. eConnect is a PASR-certified Access Point.
Finančná správa accepts voluntary onboarding and testing in 2026. Recommendation: start well before Q4 2026, so ERP integration, identifiers and testbed validation are in order before 1 January 2027.
From 1 July 2030 the framework extends to cross-border reporting (ViDA-DRR). Until then TDD SK stays limited to domestic transactions. eConnect is ViDA-ready: the platform architecture supports DRR and EN 16931.
Besides PASR accreditation for Slovakia, eConnect works according to recognised standards, including ISO 27001, NEN 7510, ISAE 3402 Type II and Peppol Certified Access Point. Data processing takes place within the EU/EEA.
More about quality and security
Schedule a no-obligation meeting. We will review whether you have domestic SK traffic (TDD SK) or only intra-EU Peppol invoices, and what PASR, Bisv3 and MLS mean for your situation.
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Compliance checklist