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Major indictable offence
District Court of South Australia
Maximum penalty of 15 years imprisonment

A person who menaces another person in order to get the other to submit to a demand is guilty of blackmail under the Section 172 Criminal Law Consolidation Act 1935 (SA).

Offence Demanding money, property, or advantage by menacing or unwarranted threats, under Section 172 of the Criminal Law Consolidation Act 1935 (SA). Examples of blackmail include demanding marriage or access to children under the threat of violence or demanding money under the threat of violence.
Maximum Penalty Maximum penalty is 15 years imprisonment; can increase to life imprisonment if aggravated by threats to kill or serious violence.
Typical Sentence Sentences vary based on the value demanded and seriousness of threats; can range from suspended sentences to lengthy prison terms for serious blackmail or extortion.
Which Court? Usually heard in the District Court; the Supreme Court may hear the most serious cases involving large sums or severe threats.
Process Timeline Complaint → Police Investigation → Arrest → Police Interview → Bail Consideration → Committal Proceedings in Magistrates Court → Trial in District/Supreme Court → Sentencing if found guilty. (Average: 12-24 months)
Possible Defences 1. No Menace or Threat - Arguing the demand was lawful or not menacing.
2. Duress - Showing the accused was forced to make the threat under coercion.
3. Mistaken Identity - Proving the accused did not make the threat or demand.
What The Prosecution Must Prove The prosecution must prove:

- An act of the accused that interfered with another person;
- Lack of consent to the act;
- No lawful justification or excuse.

If the charge is assault causing harm, the prosecution will also need to prove that harm has occurred.

Possible legal outcomes if charged with blackmail.

Commonly asked questions about assault offences.

What to do if you’re arrested or charged with assault.

Below are examples of how assault offences may be charged and sentenced in South Australia. These examples are not indicative of a specific outcome and are for informational purposes only.

Low-Level Offence

Mid-Level Offence

High-Level Offence

Low-Level Offence

Scenario:
An individual threatens to reveal embarrassing (but legal) personal information about a friend unless they repay a small debt.

What to expect:
The court will impose a term of imprisonment. Depending on personal circumstances and the offence, the court may suspend the term or impose home detention.

Mid-Level Offence

Scenario:
A person demands $5,000 from a coworker in exchange for not disclosing an affair to the coworker’s partner, delivered via threatening texts.

What to expect:
The court would likely impose a term of imprisonment to be served, depending on prior record and victim impact.

High-Level Offence

Scenario:
An offender threatens physical violence against a former partner unless they transfer $20,000, and sends multiple threatening messages.

What to expect:
A term of imprisonment is likely to be served, especially with threats of violence or actual harm, with penalties up to 20 years in prison.

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If you need more information about blackmail in South Australia, these FAQs answer the most common questions.

What is considered blackmail under South Australian law?

Blackmail involves menacing another person with the intent to make them submit to a demand. The menace may be a threat of harm (physical, emotional, reputational, or financial), and the object of the demand does not matter — it can include money, access to children, marriage, or influencing a public duty.

What is the penalty for blackmail in South Australia?

The maximum penalty is:

  • 15 years’ imprisonment for a basic offence.
  • 20 years’ imprisonment if the offence is aggravated, such as involving weapons, vulnerable victims, or abuse of authority.

What makes a blackmail offence aggravated in South Australia?

Under section 5AA of the Criminal Law Consolidation Act, aggravating circumstances include:

  • Use or threatened use of weapons
  • Offending against a child or elderly person
  • Breaching a position of trust (e.g. teacher, parent, guardian)
  • Offending in a domestic or intimate relationship
  • Acting on behalf of a criminal organisation

What does ‘menace’ mean in the context of blackmail?

A menace is an unwarranted threat that:

  • Would be taken seriously by a reasonable person; or
  • Was taken seriously because the victim had a known vulnerability.
    The threat can involve physical harm, property damage, reputational harm (like releasing private images), or economic pressure.

Can you be charged with blackmail even if you don’t demand money?

Yes. The object of the demand is legally irrelevant. Examples include demanding:

  • Custody or visitation rights
  • Sexual favours
  • That someone perform or avoid a public duty
  • Silence or retraction of testimony

What must the prosecution prove to secure a blackmail conviction?

The prosecution must show:

  • You made a menacing threat
  • The threat was unwarranted
  • The threat was taken seriously
  • You intended to get the person to submit to a demand

What are examples of blackmail scenarios in South Australia?

  • Threatening to release private images unless the victim pays money
  • Demanding access to children under threat of violence
  • Threatening a public official unless they act in a certain way

Is emotional blackmail considered a crime in South Australia?

Yes, if the emotional threat constitutes menace and is used to pressure someone into a demand, it may meet the criteria for blackmail — especially if the threat involves reputational harm, public humiliation, or known vulnerabilities.

Can blackmail be charged in domestic relationships?

Yes. If the blackmail occurs in the context of a domestic or intimate relationship, the offence is automatically aggravated and carries a higher penalty of up to 20 years’ imprisonment.

Is it blackmail to threaten legal action unless someone pays you?

Generally no, as long as the threat of legal action is lawful and warranted. However, if the legal threat is false, coercive, or accompanied by personal threats, it may cross into blackmail territory.

What defences are available to a charge of blackmail?

Defences may include:

  • Duress (you were threatened into making the demand)
  • Factual dispute (you deny making a threat or demand)
  • Lack of intent to menace or coerce
  • Mistaken identity
  • Mental impairment affecting judgment or comprehension

Is it still blackmail if the person never actually followed through on the threat?

Yes. The offence occurs at the time the menace and demand are made, regardless of whether the threat is ultimately carried out.

Can blackmail charges be brought if no money changed hands?

Yes. The demand need not be fulfilled for the offence to be complete. It is enough that a threat was made with the intent to gain compliance.

Is blackmail treated differently in other Australian states?

Yes, while the core elements are similar nationwide, each state and territory has its own legislation. In NSW, for example, blackmail is governed by the Crimes Act 1900 and carries different thresholds and penalties.

What court hears blackmail charges in South Australia?

Blackmail is a major indictable offence and will typically be heard in the District Court or Supreme Court of South Australia, depending on its severity and circumstances.

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