It depends on what POS software you´re using. In some systems we´re able to inform the POS software if the customer is registered. In that case the paper receipt won´t get printed and the person will instead get a notification to their phone after purchase. In other cases you´ll always get a choice in the POS software if you want to print it or just save the receipt digitally if the customer is registered with Rezeet. To be able to make that choice, you need to ask the customer.