Fully automated VAT ID check & Master data maintenance

With one solution you fulfill the legal requirements regarding the VAT audit for intra-community deliveries. Simple, fast and secure!

What our partners and customers say

Bernhard Lorenz

Managing Director
HEINEMEYER Stahlhandel GmbH

We use the Optimus VAT ID checker for all new customers from nearby Alsace. The tool relieves us of a lot of work and creates more freedom for customer service. We are very enthusiastic about the competent advice and quick set-up.

Carsten Wagner

Partner at dhmp

With Optimus' VAT ID Priifer, we offer our export-strong clients an easy-to-use and efficient tool for automated VAT ID number checking as part of their tax compliance. Especially medium-sized clients with high-value services and assets appreciate this feature very much.

Seven Müller

Head of Finance & Payroll Hans Conzen Kosmetik GmbH

As a premium provider in the international environment, we need to verify the VAT ID. With Optimus' VAT ID Verifier we have found an ideal solution, which saves us a considerable amount of time during the verification process. We are completely satisfied with the cooperation.

MTF Technik

Management MTF Technik Hardy Schurfeld GmbH & Co. KG

Once a month we check all outgoing invoices. For this purpose, we use the Excel solution from Optimus. The Optimus solution is easy to use because the audit is done in Microsoft Excel.

Christa Schwehm

Financial Accountant PFAFF Industriesysteme und Maschinen GmbH

Due to our large number of exports, we are required to verify the VAT ID. With Optimus software, we can check a large number of VAT IDs quickly and easily, and we are also notified of any address changes. This saves us a lot of effort and time. We are very satisfied with the cooperation with Optimus.

Theresa Hofmann

Export Sales Autohaus Wenig e.K.

The new online VAT ID checker offers a modern and intuitive user interface. Daily checks and automated workflows from the auditor make it easier and even more efficient.

Raffaela Kirchner

Dierig Textilwerke GmbH

Before each invoice, we check the validity of the VAT ID number and the timeliness of the master data with the VAT ID checker from Optimus Software. This helps us avoid many returns, for example. The tool is a simple and efficient solution for us to check the VAT ID number.

Dominic Senger

Team Leader Customs & Export Milon Industries GmbH

We were looking for a solution that would allow us to easily check the VAT ID. With Optimus Software's VAT ID checker, we got exactly what we were looking for. Our expectations were exceeded.

Optimus overview




Daily queries


Years expirience

Simple integration

You can use our UST-ID checker stand-alone or directly as an integration.

Can the UST-ID checker also be used independently?

Online UST ID checker is designed to be used both standalone and as an integration. Which is very accommodating for small and medium sized businesses.

Is stand-alone also possible with automatic testing?

Even in stand-alone mode, complete automation is possible without any programming or integration effort. Feel free to arrange a non-binding live demo appointment with us directly. We will show you all the options for saving work and preventing risks.

How can I test the software?

You can test our software HERE free of charge and without obligation. You do not need to enter any payment data. If you decide to purchase and order the software, payment will be made by invoice. We do not collect any payment data.

Easy data transfer from other systems

The data transfer is ensured within a few seconds, thanks to our intuitive interface and intelligent recognition of the data. Pre-preparation of the data is not necessary.

Complete data determination only on the basis of the VAT ID

The online VAT ID checker is able to identify all the correct address components based only on the VAT ID and even return them in a structured form.

Do you know an easier way to maintain master data?

The online VAT ID checker detects the incorrect entries in your data and suggests a correction, which you can apply with one click.

Integrated quick check tool

With the built-in quick check tool, you can easily and quickly check VAT ID numbers while determining the company data. Now in the new version also for GERMAN and SPANISH VAT IDs.

Automatic background check with e-mail monitoring

Continuous checking of inserted master data with automatic PDF report archiving. E-mail monitoring notifies you when incorrect records are created. You only receive messages when action is required. Thus you save enormous effort for the daily check when delivering to your customers.

Qualified confirmation as audit-proof PDF

Within a few seconds, you can use the online VAT ID auditor to create an audit-proof PDF report with a qualified digital signature. This way, you can prove at any time that you have performed the check in time and that the data is unchanged. In addition, we check with 30 parallel connections, which results in a considerable advantage in performance compared to other solutions.

RESTful API interface

The API interface allows you to integrate and fully automate your processes from SAP, Dynamics Nav – Navision or other systems.

Have we convinced you?

Find out free of charge and without obligation in 15-30 minutes which advantages our solutions also bring to your business case. In the personal product demo, our experts will show you the range of functions of our solutions that are essential for you. We will determine the optimal use case for you based on your requirements. In this way, you optimize your internal processes and save enormous effort.