I remove the itemize receipt and take a picture of it, just in case...
I had a server DEMAND the itemized receipt back - she said that was the ONLY way should could process the payment. I was paying cash. She took the itemized receipt back (snatched it from me) and my cash and didn't return.
After xxx minutes, I was able to flag down someone else down and asked for my change back. The server said that there was no change to be returned. *insert eye roll*
I put all of that information in my report. As well as the other suspicious behavior the server was doing. (For example, taking people's coupons and then claiming the coupons were invalid. The coupons were given to the guests by the front desk.)
I was paid (thank goodness I had a habit of taking a pic of my itemized receipt as soon as i receive it).
** I also take a picture of the signed receipt - that shows how much tip I am leaving if I use a credit card - BEFORE I let the server take it. Too many times the server has changed the tip amount to give themselves more. Hard to argue something like that if I can't show my receipt...and for some reason managers to just don't believe that I wouldn't leave a $20 tip on a $5 meal. *sigh*
** I hope it works out and the OP does get paid.