The Australian Business Register (ABR) for checking an Australian Business Number (ABN) - http://abr.business.gov.au/
The Australian Securities & Investment Commission (ASIC) Connect site for looking up a Registered Business Name (RBN) or Australian Company Number (ACN) - https://connectonline.asic.gov.au/
Intellectual Property (IP) Australia for verifying a trade mark - http://pericles.ipaustralia.gov.au/atmoss/falcon.application_start
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