Can I trade in a car that isn't in my name?

Generally, only the owner listed on the title can sign it over, so you'll need that person to be present or provide a signed title and any required authorization, such as a power of attorney. If the car belongs to a family member or was inherited, there may be extra steps like an estate transfer. Rules vary by state, so ask the dealer what they need and check your state DMV's website before you go.