An investigation conducted by the ABC has revealed foreign domestic staff working in embassies in Canberra are being exploited and subjected to extremely poor working conditions.

The Four Corners report found staff have been escaping from conditions, like working for 12-18 hours a day at a rate well below the minimum wage.

Lawyer for a number of the escaped workers, David Hillard, said the exploitation occurs because diplomatic immunity prevents domestic law from being enforced in embassies and consular buildings.