A FORMAL agreement and clear understanding of expectations can help create a better environment when it comes to "boomerang kids".
Deakin University research fellow Elyse Warner presented a discussion about "adult kids who return home and what to do when they behave badly" at Bendigo Library on Monday for the start of Law Week.
The "boomerang generation" is a term applied to young adults who, despite periods of living away from the family home, return to their family of origin.
"I've looked at the positive and negative sides so I have a bit of an appreciation of both aspects," Ms Warner said.
"Some of the reasons why adult kids will come back include loss of employment, relationship issues including separation and divorce and mental health issues.
"They feel they can't cope without their parents so they decide to move back in with their parents.
"Overriding all of that stuff is the financial reasons.
"Kids don't have the money to be able to afford to live out by themselves, that's why they come home and "scam" off their parents.
"They try to get their parents to pay for as much as possible but they're not really outlaying very much money."
Ms Warner said communicating a list of guidelines and expectations could help with the cohabitation experience.
"And coming up with a timeframe, a period in which they can stay, is important," she said.