Customer tests Shake Shack kiosk after wife claims she was charged more for choosing 'no tip'

A Shake Shack patron describes how he filmed a second purchase after his spouse noticed an unexpected difference in the amount she paid when she chose not to leave a gratuity.

A Shake Shack patron describes how he filmed a second purchase after his spouse noticed an unexpected difference in the amount she paid when she chose not to leave a gratuity on their original transaction.