Once direct debit has been set up by a bill payer, simply send out an invoice as you would normally do. The Parent will receive an email like the one shown below with a payment link 'Pay Now'. If the parent or bill payer has payment arrears or uses alternate payment methods like voucher payments/others, they can enter an amount they wish to make a payment for. If no action is taken, the current invoice amount stated will be debited on the due date. To learn more, please refer to Step 4 & Step 5 of 'Online Direct Debit & Automated Payments'.
When the bill payer clicks on the 'Pay Now' link they'll see a payment page like the one shown below. Here they can enter a preferred amount and make the payment.