When you want to update an Alternative contact number or Alternative email in your case.
Here are the steps to add an alternate contact on a case:
1. Login to the support portal and go to Case management
2. Click on the case number you wish to add an alternate contact. Edit the Alternate contact Details Selection
Three alternate email IDs with an alternate contact number can be added. This will update the alternate email and contact number on the case.
Should you need any further assistance, contact Broadcom Customer Care