Almost 500 cases by members of the public have been taken against Tusla in the last five years, according to the Child and Family Agency, which furnished the information to Aontú.
In a letter to Aontú leader Peadar Tobín, Tusla said its Office of Legal Services collated data from a number of sources, including the State Claims Agency.
In total, 460 claims have been made against Tusla since 2016.
The highest number was in 2019.
In 2016, 77 claims were made against the agency, and that figure rose to 88 in 2017.
There were 65 claims in 2018.
Claims more than doubled the following year to 152 and fell again in 2020 to 51.
There were 27 claims by the end of March this year.
The information was furnished as a result of a Parliamentary Question to Minister for Children Roderic O’Gorman by Deputy Tobín’s office.
The correspondence from Tusla also confirmed that since 2016, there were 19 proceedings against the Agency for non-childcare matters.
The letter did not elaborate on the nature of the claims.