Khi nhận được giấy báo ngân hàng hoặc phiếu chi do khách phát hành (trong trường hợp thu nợ bằng tiền mặt) chứng tỏ tiền hàng phải thu khách hàng đã được thanh toán.
When receiving paper bank statements or votes by spending released (in the case of debt collection in cash) demonstrates the amount receivable customer has paid.
Upon receiving a bank statement or payment orders issued by the customer (in the case of debt collection in cash) demonstrate customer receivables for goods already paid.