I would recommend that you call the restaurant first to see if they are able to assist.

Under normal circumstances: it's best to start with the merchant, if possible. I'm leaving it for future readers that may be interested in information about a refund to a CC. Note: The previous version of this answer is based on the refund being issued to a credit card, which no longer applies to this specific question. Tl dr: Based on your recent update that the receipt says cash refund, which you didn't receive, if it were me, I'd just dispute it now and be done with it. Is this an appropriate situation in which to use my credit card's 'dispute charge' feature? Or is that a misuse of this feature? Note that the initial bank charge appeared on my card immediately, I even got a text alert for it. Two weeks later, my bank still shows I was charged for the meal and never refunded. The receipt was for a cash refund, though the manager said he put the money back to my card. Update: I showed my receipt to the manager of another store in the same chain, confirmed the receipt was bogus. He asked for my credit card, then came with a receipt with negative signs after the prices and said I was refunded. I went back to the store and asked for a refund from the manager. I paid for a rather extensive breakfast ($11) and I was instead given food probably left out over night, which isn't even on the menu at 7 am. When I arrived at my destination, I found my order was wrong, plus the food was very stale and cold. I ordered some food at a popular fast food chain, through drive through.

Chase dispute charge for a lost item