There is no delivery confirmation or tracking system for commissary orders. Once funds are on the books and your inmate places a commissary order, the only way to know it was received is to ask them directly during a call or through a letter.
Commissary orders are typically filled once a week on a set schedule for each housing unit. After the order is processed, items are delivered to the inmate's cell or bunk. If something on the order was out of stock, the amount is usually credited back to the account rather than substituted with something else.
If your inmate says they did not receive something they ordered, the first step is to have them check with their housing officer or the commissary department to confirm the order was processed and whether any items were unavailable. Discrepancies in commissary orders are handled internally through the facility and your inmate is the right person to follow up on it from inside.
From the outside, the most reliable confirmation is a direct conversation with your family member. If they received the order, they will know. If something was missing, they can report it through the proper channels at the facility.