Some states have different rules about car titles. For example, in some states, you may not need a title if the car is older than a certain age or if it is being sold for scrap. It is important to check with your local DMV to find out the specific title requirements in your state.
If you do not have the title to your car, you may be able to get a duplicate title from the DMV. There will likely be a small fee for this service, and it may take some time for you to receive the duplicate title in the mail.