Answer:
If you have been declared legally bankrupt in Australia, you may not be permitted to travel overseas at all, or without satisfying a number of conditions imposed by the Federal Court and/or your Trustee.
Australian Bankruptcy laws apply within Australia, even if the bankrupt party lives overseas.
Concerned parties in other countries have the right and the means to do a credit check on you through "Insolvency and Trustee Service Australia" (ITSA).