The Australian government is encouraging young women and girls at risk of forced marriage to develop secret safety plans to escape the illegal practice.

Minister for Justice Michael Keenan released a statement on Thursday, announcing a "how-to" guide had been uploaded to the Attorney-General's Department website which was aimed at helping young women and girls facing the prospect of a forced marriage.

The guide offers tips for girls to leave home quickly, secretly purchase cheap mobile phones and use "safe" words to confirm their identities.

The plan also encourages potential victims to save the number for the Australian Federal Police in a mobile phone under a name that won't arouse suspicion.

There is also a form prompting women to provide details including what documentation to take if leaving home quickly ( passport, drivers license, Medicare card, marriage/birth certificate), what to do once they have escaped, including what to do when being followed and how to keep children safe.

"Forced marriage is an insidious and hidden crime. It is illegal and there is no place for it in Australia," said Keenan.

"This government is reaching out to the mostly young women and girls who may feel vulnerable to forced marriage because we want them to find help and stay safe."

"We will prosecute anyone found to be coercing, threatening or deceiving someone into marriage."

Keenan said that by providing help to those that might be scared to speak up, Australia can end forced marriage and the violence that is often associated with it.

"With the right tools we can empower young men and women to protect themselves and their friends, and get help when needed," he said.