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Basic Information About ACN/ACN Lookup



Every company in Australia is required to secure an ACN/ACN Lookup, which refers to a unique numerical identification that contains 9 digits. This is issued by the Australian Securities & Investments Commission (ASIC), in compliance with the Corporations Act of 2001.

The ACN/ACN Lookup is required to be indicated in a number of documents, with the primary purpose of assigning each duly registered Australian company with a numerical identification in the course of transacting business with various entities.

The ACN/ACN Lookup is generated using algorithms, with the last digit assigned as its check digit, which is used as basis for any inquiry, monitoring and verification.

The ACN/ACN Lookup is required to appear on all of the company’s eligible negotiable instruments as well as public documents. In particular, the ACN/ACN Lookup should appear in the following documents:

  1. Company letterheads
  2. Official company notices
  3. Receipts
  4. Promissory notes, cheques and bills of exchange
  5. Orders for goods and service
  6. Statement of accounts, included invoices
  7. Written advertisements such as completion of an order form
  8. All documents required to be lodged with ASIC

In cases where the company name appears in a number of pages of a certain business document or a negotiable instrument, it is important that the ACN/ACN Lookup appears on the first page following the name of the company. If the document contains a list of different companies, each company name should have its corresponding ACN/ACN Lookup indicated right next to it, written clearly.