Bill Validator Puns

So for background, I work at McDonald's. I have to scan every Euro Bill 50 € and up.

So one day a dad comes in with his two little daughters. He places his order and hands me a 50 € bill. I scan it and scan it again and the machine won't recognize its validity, when the dad says:'That's odd, I JUST changed my printer's toner' Daughters facepalm other dads in line nod