How long will it take for eBay to remove feedback?
Most automated feedback removal is immediate. When you ask eBay to remove feedback and it's confirmed eligible, in most cases it will be removed while you are on the phone with the Customer Support representative.
How will I be notified once feedback is removed?
Generally, you are not notified that the feedback was removed. You will see that the feedback is no longer present on the feedback profile page and your feedback rating (percent positive) calculation will also be adjusted. You can also see on your seller dashboard when feedback has been removed.