Viva Fiscalisation for ISVs

Viva Fiscalisation is the digital bridge between your software and government tax requirements, removing the need for physical fiscal hardware. This guide is for ISVs and Software Partners building solutions for multiple merchants across regulated European markets.

1. Choose your integration path

Select the method that matches your software architecture.

ℹ️ Not an ISV? Viva Fiscalisation is also available for individual merchants and simpler setups. If you're not building for multiple clients, see the Fiscalisation Overview instead.

2. How it works

Compliance is an automated 3-step flow between your software, the Viva Terminal, and the Tax Authority.

1. Send sales data — your system triggers the transaction via your chosen API.
2. Viva validates & signs — we handle real-time government reporting (e.g. AADE / myDATA).
3. Receive compliant result — you get the legal signature or QR code to store and print.

3. ISV partner checklist

Complete these before you begin testing your integration.

• Create a demo account — set up a Demo Merchant Account to act as your test store.
• Enable fiscal — send Viva your Merchant ID and Tax ID (AFM) so we can enable the fiscal flags on your testing account.
• Download the app — Viva Terminal (Demo). iOS partners: request a TestFlight build from your contact.
• Run the initial sync — send one Start Receipt request per merchant to initialize the tax connection.

Useful links

• Core API: ftPayItemCase Fields
• Greece: Business Use Cases & Samples
• Visual Receipt Mapping
• ISV Integration Support