Police have begun a leaflet campaign to encourage people to come forward in the investigation into mother and baby homes.
The criminal investigation is looking into allegations of physical and sexual abuse at mother-and-baby homes, Magdalene Laundries and work houses.
To date, police said they have received 57 reports, including some from mothers who have never met their children.
The campaign began in south Belfast, but will cover all of NI.
The police investigation was launched following a report in which women said they were detained against their will, used as unpaid labour and had to give up babies for adoption.
It spans a time period from 1922 to 1990.
“The last known institution closed down in 1990. This is not a lifetime ago, and we believe there are people out there who are still suffering in silence,” PSNI Det Supt Gary Reid said.
“It’s important that we are engaging with our local communities about this investigation as there were so many across Northern Ireland that have been affected in some way by these institutions.
“We want to reassure anyone impacted in any way that this investigation is still very much live and ongoing and that we want to hear from them.
He added: “If you were the victim of abuse or other forms of criminality in any of these institutions, or know somebody who was, or if you witnessed anything suspicious, please contact us”.