1. Navigate to the Customer Card.
2. Scroll down on the right side of the Customer Card to locate the Dup Check section.
3. Identify the merged customer by reviewing the list. In the provided example, the customer has been merged 14 times.
4. To undo a merge, select one of the customers, such as the one with no email, by clicking the Undo button.
This action immediately unmerges the selected customer from the others. The customer retains its history up to the time of the merge.