VAT ID Validation & Bulk Risk Check – Comprehensive Liability Protection

by Melomate UG (haftungsbeschränkt)

Minimize tax risks with BZSt/VIES integration. Features real-time validation, Bulk Risk Check, and audit-proof logs. Configurable handling of invalid VAT IDs ensures compliance.

Expected release: May 2026

Compatible with:

Self-hosted

Includes:

Free trial month

The subscription starts with a free trial month during which it can be canceled at any time.

All updates

During the subscription all released updates are included for free

Support from the Extension Partner

In case you have any questions or problems with your extension you can always ask the Extension Partner for help during the subscription.

Description

Highlights

Comprehensive Liability Protection: Minimization of tax risks through direct BZSt integration.
Bulk Risk Check: Unique analysis and risk scoring of the entire existing customer base.
Maximum Conversion Safety: Flexible control (Block, Gross Fallback, or Net under reserve).
Data Quality: Automatic address correction suggestions based on official registry data.
Process Automation: Instant Net price display via Flow Builder control.

Features

Real-time validation directly in the registration form
Re-validation upon entering the checkout process
Verification against official VIES interface (EU)
Verification against official BZSt interface (DE)
Smart caching to reduce page loading times

Permanent storage of validation status on the order record
Storage of validation result on customer (CustomField)
Option to completely block the purchase completion
Option to automatically switch to End-Customer status (Gross)
Option to allow tax-free orders with a warning marker
Calculation of an individual risk score per existing customer
Audit-proof logging including timestamps and raw data
Configuration of tax-free countries via Shopware standard

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About the Extension

VAT ID Validation & Bulk Risk Check – Comprehensive Liability Protection

Real-time VAT ID validation via BZSt & VIES, automated address suggestions, and customer base risk assessment.

This extension provides a professional solution for minimizing tax risks in B2B commerce. The plugin not only ensures the validation of VAT identification numbers but also enhances data quality through automated address suggestions. If the data entered by a customer deviates from the official corporate records, correct address data is offered for selection (provided the interface returns such data).

Depending on specific risk management requirements, the system can be configured to handle orders with invalid or unverified VAT IDs in three ways:

Block Order: The checkout process is prevented.
Fallback to Gross: The order is automatically calculated including VAT (treated as a retail customer).
Net under Reserve: The order is permitted tax-free but is clearly flagged in the administration for manual review.

An intelligent caching system minimizes redundant server requests and ensures fast loading times within the storefront.

Comprehensive Liability Protection & Bulk Checker

In addition to real-time validation (registration, cart, and checkout), the integrated Bulk Checker allows for an analysis of the entire existing customer base. A calculated Tax Risk Score identifies potential financial liabilities caused by outdated or incorrect master data, serving as a reliable record for internal and external audits.

Official Interfaces (BZSt & VIES)

Validation is performed exclusively through official government interfaces:

BZSt (Federal Central Tax Office): Recommended for German shop operators to ensure legal compliance during tax audits.
VIES (EU Commission): For validating European VAT identification numbers.

Technical Notes: Neither BZSt nor VIES support the validation of German VAT IDs for purely domestic transactions (DE to DE). Furthermore, some countries (e.g., Spain) do not transmit address data via VIES due to data protection regulations, which means address suggestions cannot be generated for those regions.

Automation with Flow Builder

The plugin provides the condition Customer has valid VAT ID directly within the Rule Builder. This rule can be seamlessly integrated into the Flow Builder to trigger automated processes.

A primary use case is the automatic assignment to a net customer group following a successful registration. This ensures that tax-free prices are immediately visible to the customer in the storefront.

VAT ID Validation & Bulk Risk Check – Comprehensive Liability Protection

Real-time VAT ID validation via BZSt & VIES, automated address suggestions, and customer base risk assessment.

Depending on specific risk management requirements, the system can be configured to handle orders with invalid or unverified VAT IDs in three ways:

Block Order: The checkout process is prevented.
Fallback to Gross: The order is automatically calculated including VAT (treated as a retail customer).
Net under Reserve: The order is permitted tax-free but is clearly flagged in the administration for manual review.

An intelligent caching system minimizes redundant server requests and ensures fast loading times within the storefront.

Comprehensive Liability Protection & Bulk Checker

Official Interfaces (BZSt & VIES)

Validation is performed exclusively through official government interfaces:

BZSt (Federal Central Tax Office): Recommended for German shop operators to ensure legal compliance during tax audits.
VIES (EU Commission): For validating European VAT identification numbers.

Automation with Flow Builder

The plugin provides the condition Customer has valid VAT ID directly within the Rule Builder. This rule can be seamlessly integrated into the Flow Builder to trigger automated processes.

Details

Available: English, German
Latest update: 14 April 2026
Version: 1.0.0
Category: B2B extensions

About the Extension Partner

Melomate UG (haftungsbeschränkt)

See all extensions

Partner Status

Shopware
Extension Partner

Details

Ø-Rating: 5

Average rating of 5 out of 5 stars
Partner since: 2024
Extensions: 7

Support

Based in: Germany
Speaks: German, English
Response time: Very quickly