CMR write down tax return question

I'd like to report a capital loss in this tax return for CMR holding.

Is there any process or paperwork formality I would need to do prior to reporting a capital loss in my tax return with regard to the de-listed CMR shares?

Or is it as simple as what I bought them for is my total losses that I report in tax return and that it's simple enough to prove i had a holding and that they no longer exist and have no value, should there be any questions later?

What have others done?

Found this;

"subsequent to its delisting the company appoints (as of today) administrators and receivers 17/06/2016

delisted from the close of trading on Monday, 31 August 2015 the company was removed from the Official List pursuant to Listing rule 17.15 01/09/2015"

	Column 1	Column 2
0	subsequent to its delisting the company appoints (as of today) administrators and receivers	17/06/2016
1	delisted from the close of trading on Monday, 31 August 2015 the company was removed from the Official List pursuant to Listing rule 17.15	01/09/2015

http://www.delisted.com.au/company/compass-resources-limited