What is it?
If you select this checkbox, Amazon will fulfill your orders for this marketplace in a completely unbranded package (no Amazon tape or logo, nothing).
This is currently in beta on Amazon’s side so users should only turn this on if they are in the beta program. Checking it and not being in the program could mean one of two things: Amazon ignores it. Amazon fails your fulfillment.
How to Set it Up in Listing Mirror?
Go to the Edit Integrations page for the marketplace that you want Amazon to use unbranded packaging for.
Go to the Inventory Tab, and enable "Amazon Blank Box."
In order to enable this setting, you will need to have "Autofill MCF Orders" enabled as well!