In development now but interested in the feedback. Would it help if you could download an app that is extremely simple. Options (all built into app) are just take a photo of a document (log coupon, ASIR, hazard report etc....) and it sends it into central location?
I would suggest that smart phone and confidential are not two words that belong in the the same sentence.
Smart phones are tracking devices and I doubt very much you could send a truly anonymous message with them. Especially if it all got a little nasty I am sure that the Australian Government would be able to figure out who sent the message confidential or not.