If this option is available, it means that further information might have been requested, prior to authorisation. To remove further information being required you can select the "No Information Required" button from the actions menu, whilst on the authorisations detail page.
There are two free form text boxes on this page, one for a reference and the other for notes. To use either of these text boxes, simply tap the box and begin typing.
To go back to the authorisation details page, without submitting an action, tap the "back" button in the left hand corner of the screen. To submit the action, please tap the "Submit" button in the right hand corner of the screen.