You can list NFL tickets on more than one secondary marketplace.

• If the tickets you listed on StubHub sell on a different NFL-partnered marketplace: The ticket-sharing technology should take them off StubHub. However as a seller, you must ensure the tickets are listed correctly and taken down based on other marketplace activity.
• If the tickets you listed on StubHub sell on a non-partnered secondary marketplace: You need to delete the listing from StubHub to prevent a double sale.

 
Sellers are responsible for managing their listings through 'My tickets' > Listings (desktop) or 'Sell' > 'Active listings' (StubHub app).