Crimestoppers is making Ngaruawhahia residents more aware of the service as police continue to investigate the suspicious death of Serenity Jay Scott-Dinnington.
The six-month-old died last month after being admitted to hospital with non-accidental head injuries.
Crimestoppers chief executive Lou Gardiner said there has been a leaflet drop in the town.
He added they have recently printed new posters with the short message 'Speak up anonymously', which have been distributed to every house and business in Ngaruawhahia.
The police, NZ Post and local community members were involved in the operation.
Residents are urged to call Crimestoppers if they have any information about Serenity's death.
0800 555 111