Unsurpassed simplicity in the verification of
USt ID numbers.

Our solution is fully integrated with Excel and offers you incredible flexibility in preparing, auditing and automating your processes.

  • Easy manageability
  • Mass verification within minutes
  • Qualified confirmation by BZSt.
  • Correction and master data maintenance
  • PDF report with qualified digital signature
  • DSGVO & GoBD compliant (IDW PS880 audited)
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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.

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Daily queries


Years expirience

Is there an easier way to maintain master data?

With the VAT ID checker you will find out all the correct master data within a few seconds, and you will be able to compare them with yours in the easiest way… Try it!

Complete data determination only on the basis of the VAT ID number

The VAT ID checker is able to identify all correct address components based only on the VAT ID and even return them in a structured form. Thus, you can check the whole dataset with only 2 mouse clicks.

Qualified confirmation as audit-proof PDF

With the VAT ID checker, you can create an audit-proof PDF with a qualified digital signature in just a few seconds. This allows you to prove at any time that you have performed the check and that the data is unchanged without a complex archiving system.

SDK - interface can be integrated into any system

The REST and SOAP interfaces SDK from the VAT ID checker are easy to integrate into any system. They cover a wide range of functions within just one API call. They offer significant added value by automatically detecting incorrect addresses and data and automatically suggesting the correct results, even in a mass verification process. In addition, you also receive the audit-proof qualified PDF with digital signature via the interface.

All testing options of our software visualized and described in short videos

Click on the respective button to start the video.

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.