I received a letter from Centrelink about this - its a random survey to trying and weed out Centres lying about childrens attendance hours.

Call from (03) 5454 5999 on 04/03/15 @ 534Pm saying they were from dept of social services, asking information about my childs attendance at day care over the last month. They did not ask for my name, or even say my childs name. She said the call was being recorded which did not have the proper recording notice to make this legal in Australia. I queried this and she verbally only gave the recording notice (not to Aust standards) When I asked about this, she said she would turn the recording off.
When I told them now was not suitable to talk as i was driving they said I would be put down as uncontactable.