Use
This function enables you to reverse a corporate action that has already been posted.

You have to use this function if you were posting a corporate action and the activity was terminated.
Integration
From the various reversal functions available in the securities area, you choose the one that corresponds to the flows you want to reverse.
For more information, see
Overview: Reversals in Securities.Prerequisite
Make sure that no flows have been closed after the key date.
Procedure

You should only do this if the corporate action cannot be reversed in Financial Accounting (FI), for example, because the document in FI has already been reversed.
Result
The flows posted in the company code are reversed. The corporate action is transferred to status 3 or 4.
If the corporate action has status 4, you can transfer it to status 5 (reversed) using the Deactivate function.
See also:
Corporate Actions Editing a Corporate Action