Why should the store save emptying receipts?

The receipt is a document of value and must be saved until Returpack's monthly report has been sent out. If the memory in the machine has been lost or the machine has not been read by the machine supplier, you can quickly see it if you check the receipt/machine number against the monthly report. Should a receipt be missing in the machine's memory, but you have the physical one, you can send it to Returpack for manual registration, and you will receive the correct payment. If the receipt from customers is missing, it can be dofficult for Returpack to provide the correct compensation.