The balance card as a payment method is determined by product, transaction or price variation. Go to the product for which you want to issue a balance card as a payment method. In the ”Payment methods” section, select the balance card that will be used to pay for the product. There can be several balance cards. The balance card selected in this section will affect all product variations. If you want to set the balance card as a payment method for only one price, for example, you must set it in the product variation section (see the picture below).
If you have many products at different prices and only some of them can be purchased with a balance card, go to “Price information and product variations” and select the price variation for which you want to assign a balance card (s) -> edit -> select a balance card. If this price variation is only available for purchase with a specific balance card, activate the ”sell only with selected balance card” item.