Can my bank prohibit me from using Qwist/the partner service?

No. Since January 2018, European banks must have transposed consumer rights to use payment initiation and account information services into their online banking terms and conditions. The bank is obliged to do this and can, for instance, no longer prohibit you from passing on access data to regulated service providers such as Qwist. Qwist and the bank are obliged to communicate with each other in a secure manner. Innovative services such as Qwist’s, as well as the benefits for you in your daily life should thus be promoted.