What is a billing address? It is the address you provided to the bank when registering a payment card (your residential address). The store requests a billing address to verify your payment card. During the payment process, the store may request the card issuer to check if it indeed belongs to you. If the payment at the store was unsuccessful, most likely, the online store does not accept cards from the Republic of Romania. You can contact the seller for guidance. Be careful! Do not confuse the billing address with the shipping address, as otherwise, the shipment will not be accepted at the warehouse.