The Government is considering making it illegal for parents to give alcohol to people under 18 without getting permission from their parents first.
Justice Minister Simon Power is looking at the Law Commission report on alcohol reform, which also proposes raising the drinking age and reducing the availability of alcohol.
Mr Power says parents are telling him they want clearer guidelines on who is responsible for the supply of alcohol at teenage parties.
He says more needs to be done to help parents deal with social situations where young people are drinking.
The Law Commission's report suggests host parents should get consent from other parents and it wants a maximum fine of $5000 for host parents who do not comply.
The minister, who expects to respond to the commission's report in the next couple of months, says any decision he makes will not affect parents' rights to give their own child a drink at home.