Due Date' is useful for reminding your customers about the deadline of the payment. Your customers will receive notifications one day before the due date (D-1), on the due date (D+0), and seven days after the due date (D+7). \nMeanwhile, the 'Payment Link Expiry' can be customized based on the preferred date and time. Once it exceeds the designated time, customers can't make payments through the Payment Link.