Where a Go Cardless mandate is in place for a client, it is possible to collect a one-off payment against an invoice. However, ther eis no option to enter a future processing date for this payment.  Often the invoice has a future due date for payment and it would be good to schedule th epayment to be collected in line with the payment due date when the invoice is created. Currently, I have diarise to go back to the invoice and collect the payment when it is actually due.