Minister for Justice Frances Fitzgerald has said the Government remains strongly committed to locating the remains of those who were killed by republican paramilitaries and secretly buried during the Troubles.
The bodies of ten of the group, known as the Disappeared, have been found and a new search for one of the six still missing is expected to get under way in Co Meath later this month.
After the Good Friday Agreement, the Irish and British governments set up the Independent Commission for the Recovery of Victims' Remains.
It has a confidential telephone number and post box and information it receives can only be used to help recover the dead.
In eight of the ten cases when remains were found, republicans and/or others provided crucial information.
A search for Belfast-born Joe Lynskey is due to begin in Co Meath this month.
Ms Fitzgerald has said "out of human decency, I appeal to anyone who can help bring an end to this suffering to do so".