Sinn Fein TD Brian Stanley has called on his colleagues in Laois, Offaly and around the country to back a bill on adoptive rights.
This bills seeks to create legislation to ensure that adopted people have a legal right to access their own birth certificate.
The legislation will come before the Dail on Wednesday.
Mr Stanley said: “Wednesday is a hugely important day as the Dáil will consider Sinn Féin’s legislation to ensure all adopted people over the age of 18 have a legal right to access their own birth certificate.
“I am calling on all TDs to do right by adopted people and back this Bill.
“After decades of waiting, we can finally right a historic wrong and deliver justice for adopted people who have been denied access to their birth certificates and their personal information.
“For far too long, many adopted people have been treated appallingly when they have tried to access even the most basic information about themselves.
“On Wednesday, we can finally make this happen and deliver this right. We can ensure there are no more delays.
“Sinn Féin spokesperson on Children, Kathleen Funchion TD, has worked closely with survivors on this legislation to listen to their calls for action.
“This legislation is led and is widely supported by survivors and adoptee groups. It’s time to listen to survivors and put this right.
“I am urging the public to show your support online and by contacting your local TDs.
“We have an opportunity to right this historic wrong and make a real difference for adopted people.”