Me: "I'm sorry, I can't pay you."
Tradie: "Yeah, OK, we can organise a payment plan."
Me: "Sorry, let me be clear, I literally am unable to pay you."
Tradie: "Err..."
Me: "First of all, you haven't provided me with an account name. Second, you have an extra digit in your account number. And finally, you have replaced all the 1's in your account number with lowercase Ls. I am literally unable to pay you with the account details you have provided."
This is an actual conversation I've had with a tradie after ~3 weeks of me ringing him to organise payment for a job which he had finished. At this stage, I wasn't actually annoyed, I was impressed.