Issuing warning is an enforcement power in the Australian Charities and Not-for-profits Commission Act 2012 (Cth). The ACNC may issue a charity with a warning that they are not meeting their obligations, and explain what action the ACNC make take if issues are not addressed.

This power is used to address non-compliance, and can only be exercised on 'federally regulated entities' - a definition of which is available in the ACNC's Compliance and Enforcement Commissioner's Statement.