The only paperwork that I had to bring to the table was the MCO. There were 4 or 5 other forms that 49dollarmontanaregisteredagent gave me to fill out. Probably the only thing you would need is the title and possibly a bill of sale. Like I said, I would call $49 and tell them your situation and ask what paperwork you would need to secure from the seller. They are very helpful. Just keep in mind that the total price to create your LLC and register your car with them is currently $1049 and then you have a yearly fee of $49 to keep them as your Registered Agent and $70 to file your Annual Report, totaling $119 per year. That does not include the cost to renew your vehicle registration every year with the State.