Mistakes happen when the wrong item, quantity, customer, or payment method is selected. Do not silently change a notebook or create a second sale that hides the original error.
KobStore allows the latest recorded sale to be reopened. The sale is voided, stock is restored where applicable, and the basket is returned for correction. The seller can then record the corrected transaction.
Use this process immediately and check the daily total afterward. A visible correction is easier to explain than an unexplained difference.