We have a Customer that is going to fund a refundable prepayment account that we can drawn down on in certain instances. At the end of the contract if that account still has funds then the remaining amount is to be refunded. To accomplish this we would like to use NetSuites standard Customer Deposit Functionality. Do we need to Invoice for the Customer Deposit? OR do we simply wait for the Customer to remit the payment for the refundable prepayment account and create the Customer Deposit for the Payment Amount?