Wendys they gave me back change with a fake $10 bill san jose, California

that maybe wendy's didnt do it on purpose? In the drive-thru its very likely that someone else paid with the fake 10. The employee didnt notice and you got it in change. Its far more likely than your scenario of the manager screwing customers with counterfeit bills. Have you taken it to a bank to turn it over to the secret service? They can, and will, investigate this for you. Counterfeitting bills is a serious crime, and they will want to see your bill.

d**n, you caught us.  Instead of the  french fry machine, we print bogus 10.00 bills.  We try to give as many away  in change as we can so we can increase our profits.

We instruct our employee's to deny that you got the bill from here, and you know what at, you are SOL because  you cant prove anything.

 OMG, I just gave you the proof you need.