After a registration has been invoiced to a client a manual invoice should be created to add additional items as this will stop them from being charged multiple times for the same order.
This can be done on the following page:
Back Office > Survey - Processes > Ordering - Manual Invoices
1. Select the survey/size and company that the order is to be created for
2. You should select the order type that reflects the item you are ordering. e.g. to add 'Accreditation' to an order you should select the 'Additional Survey' order type.
You should only select the 'Survey Registration' order type if you are creating a NEW registration for a survey.
If you select this option when a registration order has been created for the same years process, then the items in the first registration order will be deleted.
This also happens when selecting Survey Registration as the option in the order items list.