No, NISP won’t provide an ASPSP Directory of the ASPSPs’ productive systems.
General Question on the Berlin Group NextGenPSD2 XS2A Framework.
In case of an error, the TPP should contact the ASPSP and report the issue.
It is in the common responsibility of the TPP and the ASPSP to fix it and should be solved bilaterally. However, in case of escalation, the National Competent Authority can be informed.
All ASPSP are treated equally by the PSD2. However, there exist some country-specific requirements in the specification of PSD2-services. TPPs need a ‘passporting’ registration for the right to act as a TPP in the respective role and country.
An ASPSP is free to use a proprietary interface. He is obligated to provide the corresponding information and documents to TPPs. This includes in particular a specification of the implemented interface and a testing facility. In case of reasonable doubts that the used interfaces is compliant to the XS2A specification, a TPP can contact the National Competent Authority.
It is the TPP’s responsibility to provide a functionality that is able to handle various versions of the XS2A interface or any other interface used by ASPSPs. ASPSPs are obligated to provide the required information on their interface.
It is referring to different possible account identifiers (IBAN, BBAN but also aliases like MSISDN).
The ASPSP will choose the account type for the implementation of its /accounts endpoint.