A worker was shorted $20 in his paycheck, and complained to the payroll department. “You were overpaid $20 last week and didn't object,” reasoned the payroll supervisor. “I know,” said the employee. “I don't mind overlooking one mistake, but when it happens the second time, I think it's time to complain.”
—From Workplace Jokes: Only SOME of Them Will Get You Fired!