I got a call just yesterday from the CRA: "Hi. I am just calling because you owe $37,000.00 in taxes. How would you like to pay that today?" "My taxes are completely paid up." "I wouldn't be phoning you if they were, but let's see here. Oh, there is a payment of this amount, and a payment of this amount, and a payment of this amount... Okay, I am re-applying those payments ... then I think you owe $7,000.00." "Why don't you go and add it up and confirm for yourself that it's all paid, and if you find out that's wrong, you call me back." "I wouldn't be phoning if it was all paid up." "10 seconds ago you thought I owe $37,000.00. Now you are down to $7,000.00. Do you not think that you may be in error?" "Thank you for your time. I have made the changes." "Ya. Thanks for calling."