HarperCollins Publishers Australia does not accept unsolicited material. This includes online manuscript submissions and web site proposals. However, HarperCollinsPublishers is willing to consider material submitted by literary agents. HarperCollinsPublishers accepts no responsibility for unsolicited submissions and these will not be returned to sender.
The Australian Society of Authors has an excellent and informative website at http://www.asauthors.org/ that provides hints and advice for new writers on a range of subjects, from getting published to how much you can expect to pay literary agents.
While HarperCollinsPublishers is unable to provide editorial assessment or comment on manuscripts, there are a number of commercial manuscript assessment services available that may be able to help. Contact your local writers' centre or the assessment agency of your choice directly for further information.
Links to the websites of writers' centres in each state are listed below.
Australian Capital Territory
ACT Writers Centre: http://www.actwriters.org.au/
New South Wales
Booranga Writers Albury: http://www.csu.edu.au/faculty/arts/humss/booranga/
Northern Rivers Writers' Centre: http://www.nrwc.org.au/
NSW Writers' Centre: http://www.nswwc.org.au
Varuna - The Writers' House (Katoomba): http://www.varuna.com.au/ Submissions now open! Click here for details.
Words Out West (The Central West Writers' Centre): http://www.wordsoutwest.com.au/
NT Writers' Centre: http://www.ntwriters.com.au/
Queensland Writers Centre: http://www.qwc.asn.au/
The South Australian Writers' Centre: http://www.sawriters.on.net/
The Tasmanian Writers' Centre: http://www.tasmanianwriters.org/
Victorian Writers' Centre: www.vwc.org.au
WA State Literature Centre: http://www.writingwa.org/
The Fellowship of Australian Writers WA: http://www.fawwa.org.au/