Proof sales or excise tax has been paid;; A copy of the signed lease agreement, if the vehicle is a leased vehicle. You will need to bring in your Lease Agreement, Sales Tax form, and current proof of insurance for that vehicle to complete this process.If you buy out your lease (purchase the car) you are required to pay sales tax on the purchased price and reregister your car in your name. What are the steps to complete the purchase of my vehicle? Everyone 18 yrs of age and older has to fill out an application and we require Cosigners. Cosigners need to include a copy of their drivers license. You may renew your registration over the internet, anytime, 24 hours per day, 7 days per week at the Georgia Department Of Revenue web site. Through our Let Yourself In® service, you can access and view a property on your own schedule, without a leasing agent present. 1. My understanding has always been that the rental agreement is enough to serve as registration and some places may still inform you as such when you rent. The Guide explains what you should know when applying to rent, living in a rented property, and dealing with the end of a lease.