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Information managers and other stakeholders can rely on a framework of various international certification standards for digital repositories in order to assess and improve the quality of their work processes and management systems. ‘Trustworthy Digital Repository’ (TDR) is a term often used in this respect.

Three certification instruments, with increasing degrees of complexity and depth, are available:

The assessments vary in intensity from a peer review of completed documentation (self-assessment) in the case of DSA to a prepared on-site visit by an external audit team in the case of ISO. These instruments are mainly used in Europe. Outside Europe, many archives receive International Council for Science - World Data System (ICSU-WDS) certification, which is similar to DSA certification. Data sponsors, producers and re-users may trust any managing body that has been certified according to one of the above standards.

DANS received certificates of: