Questions over how Australia's ban on under 16's using social media will be enforced.

Social media sites will be slapped with fines, if they fail to take reasonable steps to follow the law — which kicks in at the end of the year.

But a Professor of Internet Studies says there is no instruction on how to check for age.

Curtin University's Tama Leaver told Heather du Plessis-Allan the easiest way would be for companies to request some kind of government-issued identification.

“We’ve added an amendment so that platforms aren’t allowed to ask for that because there were privacy concerns, so the exact technicality of how they’re going to do age verification is very much up in the air.”

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