Not all partnerships can use piggyback pixels. Permissions to use piggyback pixels are set in your partnership contract, and can vary from partnership to partnership.
From the left navigation bar, select [Search] and enter "My Brands."
Select My Brands from the Screens column.
Select the name of the brand you want to find piggyback pixel permissions for.
At the bottom of the screen, find Campaign Attributes.
Find Piggyback Pixel.
If there is a [Check] next to it, you can use piggyback pixels for this campaign.
If there is a [Cross] next to it, you cannot use piggyback pixels for this campaign.