Jen Armstrong doesn't want anyone to experience the domestic violence she did.

The 34-year-old says she was put in the emergency room three times within months and kicked in the stomach by her husband while she was heavily pregnant.

But the NSW Woman of the Year is hopeful that an Australian-first scheme giving people access to the domestic violence history of their former and current partners could save people from abuse.

From Wednesday, people at four NSW pilot districts who are concerned for their safety will be able to walk into a police station and request information about their partner's convictions and breaches of domestic violence orders.

Concerned third parties, such as family and friends, can also make an application but the information will only be given to the person who may be at risk.

Ms Armstrong says the scheme, which links every concerned person to support services, could have helped her leave her husband sooner.

"My family and friends, I know for a fact ... would have filled out this form," she said on Wednesday.

"Even if it gets one woman out before she goes through what I went through, it's job well done."

Every request for information will be processed within two weeks, with people considered to be at high risk notified within 48 hours.

Forms will also be available online and information is given verbally so as to not risk an offender finding out about the application.

Sexual, child abuse and murder offences committed outside a domestic situation may also be disclosed.

Assistant commissioner Mick Fuller said it is important a disclosure does not put a person in danger, especially in the case of third-party applications.

"The goal is to empower them (potential victims) to make perhaps the most challenging decision, which is to leave before they're a victim of violence," he said.

"We go to great lengths to make sure that the person who is subject to the application isn't made aware."

The pilot programs - at Sutherland and St George in Sydney, and the regional areas of Shoalhaven and Oxley - will be evaluated over two years.

The scheme is similar to one in the UK but Minister for the Prevention of Domestic Violence Pru Goward said the NSW pilot had a stronger emphasis on service delivery and faster disclosure times.

National domestic violence helpline: 1800 737 732 or 1800RESPECT. In an emergency call 0-0-0.

AAP