Yes, all Titleholders will need to be at the Buyback or Trade-In appointment to complete the Buyback or Trade-In transaction. If each Titleholder cannot be present at the closing appointment, you will need to bring a notarized Power of Attorney demonstrating that the absent Titleholder(s) have granted one Titleholder authority to transact the Buyback or Trade-In on behalf of others. A copy of a Power of Attorney Form can be found here. This is not necessary if the additional listed Titleholder is your lender.
If you selected an Approved Emissions Modification or Emissions Compliant Repair, it is not necessary for all Titleholders to be present at the appointment.