Quality assurance of scientific information is a precondition and integral part of digital long-term archiving. To operate successful digital long-term archiving, organizations from the fields of science, culture and business cooperate within the EU project, APARSEN. The objective of this project is to set up a “long-lived Virtual Centre of Digital Preservation Excellence”. Securing permanent access of quality assured research data on reliable repositories is a central concern of APARSEN. This report documents ideas, developments and discussion concerning the quality assurance of research data. Focus is placed on action taken by science, e-infrastructure and publishers on quality assurance of research data. Such action is documented and classified in this report. Future fields of research are then identified based on this work.