Are my PIN and TAN stored by Sofort?

No! PIN and TAN are not stored and are never visible to third parties, including Klarna and employees of Sofort GmbH. This is no false promise, because Sofort GmbH places its our own compliance with data privacy regulations under close scrutiny. The TÜV Saarland regularly evaluates and certifies the procedures of Sofort GmbH according to the guidelines of federal German data-protection law.