Union financial services sectoral specific laws contain certain rules on outsourcing, which have been further detailed by the ESAsEuropean Supervisory Authority through the development of guidelines containing the expectation for some financial entitiesas defined in Article 2, points (a) to (t) to record specific information on their outsourcing arrangements, in some cases also in the form of registers, as part of their outsourcing risk management. In recent years, several National and European Competent Authoritiesas defined in Article 46 performed data collection of information included in such registers as part of their supervision of financial entity compliance to the outsourcing requirements. Leveraging on the lessons learned from the different data collection exercises of outsourcing registers performed in the recent years by competent authoritiesas defined in Article 46 and the ESAsEuropean Supervisory Authority, the templates established by this Regulation are designed in a technology- neutral manner building up on open tables, which have a predefined number of columns but an indefinite number of rows. In addition, the templates are linked to one another by using different specific keys to form a relational structure between them.