Patent complaints are usually a bigger deal. You should take them very seriously.
If you receive a patent complaint, close the listings immediately. Do not try to sell the items on any other platform.
If you receive a patent infringement complaint and are a Private Label or Brand owner you should immediately contact an IP attorney. We recommend Casey Vaughn from Vaughn Law.
If you receive a patent infringement complaint and you bought the item retail or wholesale:
Contact the manufacturer immediately. Let them know about the complaint you received and that you will be contacting the complainant. Ask them how they would like to proceed. Usually, you can get them to buy back the inventory from you while they resolve the issue.
Contact the complainant and let them know you bought them in good faith. Send them the receipts and ask them how they would like to proceed.
If need additional help reach out to an IP attorney to help you settle the case.