Foreign nationals have been forced to offload more than $100 million worth of illegally acquired Australian real estate.

Some 15 properties in Victoria and Queensland, worth a combined $14 million, have been forcibly sold off in the latest round of divestments triggered by an Austalian Tax Office investigation.

The blitz brings the total number of forced sales of properties in breach of foreign investment rules to 61, with a combined value of $107 million, Treasurer Scott Morrison said on Monday.