The concept of at least two signatures being required for payments release has not been mentioned in regulatory provisions on PIS (PSD2, RTS, EBA opinions, ...). So far, it is neither actually covered by any of the API Standards.
This white-paper though deeply dives into the issue and explores the gaps and possible opportunities. Following topics are covered:
(Keep up with all the abbreviations with https://support.ibanity.com/glossary )
Ibanity, the API marketplace of Isabel Group.
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