Can dealer take car back after papers are signed?

Yes, if you miss payments and they will ruin your credit too. They reserve the right to seize the car at any time or place, often times when you are at work, or at the store they will show up and leave you walking home if the contract is breached. They also must keep up their end of the deal and not breach contract. I have learned that they have certain responsibilties as well, you should also read up on lemon laws. Which protect you from being scammed by car dealers.