What is a TPP? Naomi June 08, 2018 10:25 Updated Follow That's you! A (“TPP”) is a Third Party Provider. TPPs are entities that use APIs to access their customer’s accounts, in order to provide with services like account aggregation, personal finance management and/or payments. Related articles What is a PSU? What is a PSP? What is PSD1? Comments 0 comments Please sign in to leave a comment.