You sell a car to Customer X. A year later Customer X calls you up and says, "I took that car you sold me down to Paul the Mechanic because I wanted him to install a new distributor cap and while he was installing the new distributor cap the whole engine caught fire so Paul put a new engine in and now you owe me $4000".
And you say,
A) "Yea, that makes sense. Let me write you a check, or better yet let me Venmo you".
B) "Let me pay a lawyer to decide if I need to pay you for the engine fire Paul caused".
C) "Tell Paul I'll cover half of his bill. That seems the most fair way to handle it".
All of those choices seem wrong.