receipt

receipt
 n.— «In wrestling, there’s a thing called—they’re referred to as potatoes, is when you accidentally hurt somebody for real. And, you know, it—one potato’s OK, two potatoes is crossing the line, and the third one, you usually give what they call a receipt, which is you give one right back.» —“Interview With Bret Hart” by Terry Gross Fresh Air (NPR) Apr. 24, 2000. (source: Double-Tongued Dictionary)