TÜV SÜD is one of the world’s leading technical service providers of testing, product certification, auditing, and systems certification, training and knowledge services. Our services revolve around our core principle of "providing peace of mind that products are safe, reliable and compliant." STS and TUV have worked closely together since the introduction of Chip and PIN technology. TUV have completed numerous certifications of STS products used by merchants worldwide. Both companies are recognised as global EMV specialists and work closely together to resolve any interoperability issues or ambiguities in the latest version of EMV and contactless payment specifications.