According to the ATO, the fastest, most secure way to receive a tax refund is to have it paid directly into a nominated Australian bank account using electronic funds transfer (EFT).

From 1 July 2013, individual tax returns will generally require bank account details, including BSB and account number, to be entered, where a refund is expected.

Joint accounts and trust accounts will be acceptable.

Refunds will no longer be paid by cheque. Failing to  provide bank details will delay the refund.