As a TPP if you face any problems using either our Sandbox or Production APIs you can contact us via telephone or email:
telephone: +49 4106/708-2563 (Mo-Fr 08:00-16:30)
Please try to give us the full context of your request:
TPP Registration Number,
date and Time of the issue,
service: AIS, PIS, FCS (PIIS),
error message, error code, screenshot.
Our support team will answer you as soon as possible.