Information on the production launch in June 2021 – T2S Release 5.0 and CBF services - Final update


Note: This announcement and the related attachments, originally published on 22 January 2021 and updated on 19 February 2021, 19 March 2021 and 7 May 2021, was further updated to inform about the final scope of the release in June 2021.

Clearstream Banking AG, Frankfurt1 informs customers about the upcoming in June 2021. With the implementation of TARGET2-Securities (T2S) Release 5.0, CBF will introduce functional modifications. According to the T2S Release Concept, the release will be deployed on

the weekend 12 and 13 June 2021
for business day, Monday, 14 June 2021

In this Announcement, CBF outlines the scope of the T2S Release 5.0. In June 2021, T2S will introduce 18 Change Requests (CRs) in production. These are approved at T2S Steering Level.

In addition, the resolution for T2S Problem Tickets (PBIs) will be delivered. Based on the T2S reporting analysed in January 2021, nine PBIs have been identified that might have impact on CBF’s customers acting in ICP and / or DCP mode. Customers are recommended to validate these scope elements and check whether operational and / or functional modifications in their procedures are required.

Besides the functional amendments in CBF regarding the T2S Release 5.0, changes in the CBF Cash Service and enhancements for corporate actions will be introduced.

The schedule below shows the milestones related to the release in June 2021:

March 2021

5 March

Publication registration form for participation in “CBF Guided Customer Simulation”

26 March

Publication of “CBF Customer Simulation Guideline”

30 March

Go / No-Go decision to deploy Release 5.0 to T2S Pre-Production (UTEST) by Operational Managers Group (OMG)

April 2021

9 April

Deployment to T2S Pre-Production (UTEST)

23 April

Deadline for registration “CBF Guided Customer Simulation”

May 2021

7 May

Publication of “Indicative Timeline for the T2S Release 5.0 Deployment Weekend”

10 May

Start of “CBF Guided Customer Simulation”

31 May

CASCADE-PC version 10.0 will be ready for download. The installation of this version is mandatory.

June 2021

1 June

Market Infrastructure Board (MIB) approves the Release 5.0 deployment to Production

7 June

Publication of “Timeline for the T2S Release 5.0 Deployment Weekend”

9 June

End of “CBF Guided Customer Simulation“

14 June

Go-live T2S Release 5.0 and functional launch of CBF T2S related enhancements

Further information

For further information, customers may contact Clearstream Banking Client Services or their Relationship Officer. Questions related to the technical connection can be addressed to Connectivity Support. Particular questions related to the production launch in June 2021 will be routed to the experts of the T2S Settlement Functionality team.


1. This Announcement is published by Clearstream Banking AG (CBF), registered office at Mergenthalerallee 61, 65760 Eschborn, Germany, registered with the Commercial Register of the District Court in Frankfurt am Main, Germany, under number HRB 7500.