Selling a Car That Has Not Been Paid Off?

I'm trying to sell my car. It has about $20,000 remaining. If I send a check (mine + buyer's) for payoff, how long will it take for the bank to issue the title? Can the bank send to the title to the new owner or do I have to get the title and then transfer the title?

Suggestion:

you and the buyer go to the bank together (call first)
You each write your checks , give them to the person from the bank…
you give the buyer a bill of sale, the bank gives him the title….