(3)The verification function of trade repositories is of primary importance for the transparency of derivative markets and to ensure data quality. Trade repositories should therefore demonstrate that they have established appropriate systems and procedures to verify the completeness and correctness of the details of derivative contracts. Those systems and procedures should therefore be further detailed in order to strengthen the framework for the registration. They should set out how the trade repositories will authenticate users, validate schema of the data, authorise the recording of data, validate the logic and content of the data, reconcile the details of derivatives and provide feedback to their users.