Social Security (Administration) Act 1999

If notice of a decision under the social security law is:

delivered to a person personally; or

left at the address of the place of residence or business of the person last known to the Secretary; or

sent by prepaid post to the postal address of the person last known to the Secretary;

Notice of a decision under the social security law may be given to a person by properly addressing, prepaying and posting the document as a letter.

If notice of a decision is given in accordance with subsection (2), notice of the decision is taken to have been given to the person at the time at which the notice would be delivered in the ordinary course of the post unless the contrary is proved.

This section only applies to notices of decisions, and nothing in this section affects the operation of sections 28A and 29 of the Acts Interpretation Act 1901 in relation to other notices under the social security law (for example, a notice that requires a person to inform the Department about some matter or a notice that requires a person to give the Secretary a statement about some matter).