Went to Steak N Shake for dinner...and got a free meal...by mistake but ill take it...Long story…

Went to Steak N Shake for dinner...and got a free meal...by mistake but ill take it...Long story short I have the rewards app on my phn so they just scan my phone to pay well she scanned and said it went thru but I never got the receipt emailed...looked in my bank acct to double check and sure enough no charge...downside I missed out on my rewards!! :)