muppet:It's pretty easy:
Step 1) Walk into branch of bank.
Step 2) Locate a Teller.
Step 3) Say to the Teller "Hello, I'd like to pay off my mortgage please". Note: Saying the word "Hello" is optional.
Step 4) Follow instructions of Teller.
Step 5) Depart bank.
Step 6) Die happy (this step can be delayed for a period of time if you like)
Step 7) Profit...