How DonDon Group achieved fiscal compliance

As real-time fiscalization and electronic reporting became mandatory across multiple central and eastern European markets, DonDon Group - a leading regional bakery group operating in Slovenia, Serbia, Bosnia and Herzegovina, Montenegro, Bulgaria, Romania, and Croatia - had a clear goal: enable compliant invoicing for both retail and wholesale without rebuilding their core ERP.

This case study explains how DonDon, a leading regional bakery group operating across the Balkans, implemented centralized fiscalization on top of Perftech ERP.

From Fragmented Fiscal Projects to a Unified Compliance Layer

The entire Bosnia integration into the Perftech ERP environment was completed in under one week, allowing local DonDon entities send standardized transaction and invoice data from Perftech via a single integration pattern, independent of which Bosnian fiscal regime or device is in use.

Key Outcomes

• Bosnia (Republika Srpska) fiscal coverage delivered in under 1 week
• Achieved 100% fiscal coverage for:
• • Retail: approx. 1,650 bakery POS transactions / month
  • Wholesale: approx. 250 B2B invoices / month
• Support for both retail bakery sales (B2C) and wholesale invoicing (B2B)
• Hardware fiscalization dependency in Bosnia abstracted via software/API approach
• Central-level integration with a repeatable model for future markets.

Problem: Scaling Fiscal Compliance Across Bosnia and Montenegro

As DonDon expanded regionally, fiscal compliance shifted from isolated local implementations to a centralized group requirement.

The group needed to:

• Cover both retail bakery fiscalization and wholesale invoicing
• Support Montenegro and Bosnia (Republika Srpska)
• Avoid ERP rewrites for each country
• Prepare a model scalable to additional Balkan markets

Following fiscalization in Republika Srpska, Bosnia introduced an additional regulation that remained heavily hardware-driven, which typically limits clean API integrations and forces tight device coupling. To stay compliant while preserving ERP stability, DonDon required an abstraction approach that interfaces with the mandated fiscal hardware but still exposes a simple, standardized API integration to Perftech.

Solution: Centralized Fiscalization Rollout on Perftech ERP

To enable multi-country fiscal compliance without disrupting core operations, DonDon implemented a centralized fiscalization layer on top of Perftech.Largo using a structured rollout model.

1. External Layer

Instead of embedding country logic into the ERP, the team kept all business workflows inside Perftech and implemented fiscalization as an external compliance layer. Invoice flows were standardized across countries and local fiscal requirements connected via API, ensuring the Slovenian Perftech ERP core remained stable while enabling multi-country compliance.

2. Structured Market Expansion

Montenegro fiscalization was already operational and used as the expansion foundation. The team reused the Montenegro fiscal architecture, extended the unified layer, and added Bosnia and Herzegovina (Republika Srpska), completing ERP integration in under one week. This turned Bosnia from a custom project into a structured rollout.

3. Software Abstraction

Because Republika Srpska typically requires hardware-based fiscalization, the team introduced a software abstraction layer. It interfaces with required fiscal hardware where needed while exposing a clean API integration to Perftech. This allowed easier onboarding for DonDon entities and reduced future rollout complexity, transforming a hardware-heavy model into a unified programmatic interface.

4. Regional Coordination

The rollout was coordinated at the regional level to ensure production readiness and scalability. The central team in Serbia supported the Bosnia integration, the Montenegro team supported the Montenegro rollout, and Perftech together with central IT ensured ERP interface stability. This central-first approach prepared the implementation for future multi-country expansion.

Outcome: Compliance Infrastructure Ready for Scale

With the DDD Invoices API in place, apart from being 100% fiscalization compliant for both retail sales and wholesale; DonDon is now positioned to add new countries for both e-invoicing and fiscalization through the same unified integration model, without rebuilding their core ERP.

Trying to simplify fiscal and e-invoicing compliance across multiple countries?

At DDD Invoices, we help companies with multiple entities and software platforms turn regulatory complexity into scalable infrastructure through API-driven compliance layers.

With DDD Invoices, you can:

• Standardize invoice and transaction flows across entities and countries
• Connect ERPs, POS systems, and SaaS platforms through one unified API
• Support both retail fiscalization and B2B e-invoicing within the same architecture
• Expand into new regulated markets through configuration instead of new custom projects
• Enable central teams to manage compliance while local entities operate normally
• Prepare their platform for future real-time reporting and mandate expansion
• White-label and monetize the feature, if you are a software provider.

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FAQ

How long did the Bosnia implementation take?
Once device access was available, the full integration - including three fiscal regimes - was completed in under one week.

Did DonDon need to modify Perftech ERP workflows?
No. Fiscalization was implemented as an external layer, keeping core ERP processes unchanged.

Can the same architecture be reused in new countries?
Yes. The solution was designed as a repeatable pattern where new markets require mainly configuration and local onboarding rather than new development.