Which European countries require fiscalization or real-time invoice reporting?

Albania, Croatia, Slovenia, Serbia, Montenegro and Italy already run mandatory regimes; Greece requires digital transmission via myDATA; Poland's KSeF platform is becoming mandatory during 2026; Kosovo and North Macedonia are rolling theirs out; Germany and Austria regulate certified cash-register security. The EU's ViDA agenda is pushing structured e-invoicing across all member states.

Can you add fiscalization to our existing ERP, POS or SaaS product?

Yes — that is our core engagement. We integrate a fiscalization layer into your existing codebase rather than replacing your stack, starting with a fixed-scope compliance assessment that maps your invoice flows to the target country's requirements.

How long does a fiscalization API integration take?

A single-country integration into an existing product typically takes 4–10 weeks end to end, including certificate setup, tax-authority test environments and certification. Multi-country rollouts add per-country adapters on a shared layer, which is significantly faster than the first integration.

What happens if the tax authority's system is down?

Every serious regime defines an offline procedure: invoices are issued with an offline flag, queued locally and transmitted when the service recovers, within a legally defined window. We build store-and-forward queues, idempotent retries and reconciliation into every integration so sales never stop and nothing is double-reported.

Do you sell a fiscalization API as a product, or build custom integrations?

We build custom integrations that your team owns — no per-invoice fees and no dependency on a third-party SaaS. Where a certified intermediary is mandatory in a given country, we integrate against it on your behalf.

Fiscalization API Integration for ERP, POS & SaaS Platforms

A fiscalization API connects your invoicing software to a country's tax authority for real-time invoice reporting. We design and build these integrations end to end — certificate handling, offline queueing, per-country adapters — for Albania, the Balkans, Greece, Italy and the wider EU. One engineering team in Tirana, fluent in the region's tax regimes.

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What is a fiscalization API?

A fiscalization API is the software interface between your invoicing system — an ERP, a point of sale, an e-commerce checkout or a SaaS billing module — and a government tax platform. Instead of printing from a certified fiscal device, your software signs each invoice digitally and transmits it to the tax authority (or a certified intermediary) at the moment of issue. The authority validates it and returns a fiscal identifier that must appear on the document, usually together with a verification QR code. Countries implement this differently — some clear the invoice before it reaches the customer, others require near-real-time reporting after issue — but the engineering building blocks are the same everywhere.

Digital signing of every invoice with a government-issued or qualified certificate
Real-time or near-real-time transmission to the tax authority's endpoint
Fiscal identifiers and verification QR codes returned and printed on the document
Structured invoice formats: UBL 2.1, UN/CEFACT, FatturaPA and national XML/JSON schemas
Mandatory electronic archival, typically 5–10 years, with audit-ready logs

Fiscalization API requirements across Europe

Real-time invoice reporting started in the Balkans and is now spreading across the EU under the VAT in the Digital Age (ViDA) agenda. If your product sells into more than one of these markets, each country is a separate API, a separate certificate scheme and a separate document format. This is the landscape we build against:

Albania — fiskalizimi (Law 87/2019): every B2G, B2B and cash invoice signed with an AKSHI certificate and cleared in real time; NIVF/NSLF identifiers and QR code on every receipt
Italy — Sistema di Interscambio (SdI): mandatory B2B/B2C e-invoicing in FatturaPA XML since 2019
Greece — myDATA (AADE): mandatory digital transmission of invoices and e-books
Serbia — eFaktura for B2B/B2G plus real-time fiscalization of retail receipts (2022)
Croatia & Slovenia — real-time receipt clearance (JIR / EOR codes) since 2013 and 2016; Croatia is extending to B2B e-invoicing ("Fiscalization 2.0") from 2026
Montenegro — electronic fiscalization of all invoices since 2021
Kosovo & North Macedonia — e-invoicing and fiscal-platform rollouts in progress
Poland — KSeF national e-invoicing platform becoming mandatory for VAT payers during 2026
Germany & Austria — certified cash-register security (TSE / RKSV) and phased B2B e-invoicing mandates

What a production-grade fiscalization integration needs

The happy path — build the XML, POST it, print the code — is a week of work. What separates a compliant production system from a demo is everything around that path. Tax authority endpoints go down; your customers keep selling. Certificates expire mid-season. A duplicate submission can mean a duplicate tax liability. We engineer for the failure modes first:

Certificate lifecycle management: provisioning, secure key storage, rotation and expiry alerts
Offline mode and store-and-forward queues, with the legally-required flags for late transmission
Idempotent submissions and reconciliation, so retries never create duplicate fiscal documents
Schema validation before transmission, with per-country rule sets kept current as regulations change
Long-term archival, monitoring and alerting designed for tax-audit scrutiny

One integration layer, every market you sell in

We don't sell a one-size-fits-all fiscalization SaaS — we build the integration into your product, as a clean internal API layer your team owns. A single fiscalization interface in your codebase, with per-country adapters behind it: Albania today, Greece or Poland when you expand, without touching your checkout or invoicing logic again. We have shipped fiscalization for the Albanian fiskalizimi regime in production systems — POS, hospitality and e-commerce — and we work in the region's languages, regulations and time zone. Engagements start with a fixed-scope compliance assessment of your product, so you know the full integration cost before writing code.

A compliance and architecture assessment of your existing ERP, POS or SaaS product
A country-agnostic fiscalization layer with per-country adapters, delivered into your codebase
Certification and go-live support with the local tax authority process
Ongoing regulatory watch and adapter updates as national rules change
Nearshore rates from Tirana — senior engineers at €35–55/hr

FAQ

Frequently Asked Questions

What is a fiscalization API?
A fiscalization API is the interface that connects invoicing software (ERP, POS, e-commerce or SaaS billing) to a government tax platform, so each invoice is digitally signed, transmitted and validated in real time. The tax authority returns a fiscal identifier and usually a QR code that must appear on the document.
Which European countries require fiscalization or real-time invoice reporting?
Albania, Croatia, Slovenia, Serbia, Montenegro and Italy already run mandatory regimes; Greece requires digital transmission via myDATA; Poland's KSeF platform is becoming mandatory during 2026; Kosovo and North Macedonia are rolling theirs out; Germany and Austria regulate certified cash-register security. The EU's ViDA agenda is pushing structured e-invoicing across all member states.
Can you add fiscalization to our existing ERP, POS or SaaS product?
Yes — that is our core engagement. We integrate a fiscalization layer into your existing codebase rather than replacing your stack, starting with a fixed-scope compliance assessment that maps your invoice flows to the target country's requirements.
How long does a fiscalization API integration take?
A single-country integration into an existing product typically takes 4–10 weeks end to end, including certificate setup, tax-authority test environments and certification. Multi-country rollouts add per-country adapters on a shared layer, which is significantly faster than the first integration.
What happens if the tax authority's system is down?
Every serious regime defines an offline procedure: invoices are issued with an offline flag, queued locally and transmitted when the service recovers, within a legally defined window. We build store-and-forward queues, idempotent retries and reconciliation into every integration so sales never stop and nothing is double-reported.
Do you sell a fiscalization API as a product, or build custom integrations?
We build custom integrations that your team owns — no per-invoice fees and no dependency on a third-party SaaS. Where a certified intermediary is mandatory in a given country, we integrate against it on your behalf.