ATHEXCSD is a direct member of TARGET (the ECB Euro payment system). Through the ATHEXCSD Ancillary System, it provides real time cash payments to/from market Participants. For this purpose each market Participant has to be serviced by a Settlement Bank that participate in ATHEXCSD ASI.

The ATHEXCSD System provides to its Participants detailed information about the daily financial obligations, and the current cash balances, as well as detailed cash transactions.