Tusla has committed more than 300 data breaches since GDPR legislation was introduced two years ago.
According to freedom information files, 43 were deemed to be 'high risk' breaches.
They include errors with postal addresses, incomplete redactions of documents and lost or stolen papers.
Tusla says it's making 'extensive improvements' to data protection governance.
But Sinn Féin's spokesperson for children, Kathleen Funchion, says the breaches are unacceptable
Water Infrastructure Project Plans To Shore Up Wicklow Supply For Decades To Come
Go-Ahead Ireland to Create 400 Jobs Boosting Public Transport in Wicklow
Pat Devlin Calls Time After Four Decades With Bray Wanderers
Wicklow Musician Earns National Business Award For Merging Traditional Culture And Wedding Celebration
Wicklow CYPSC Launch Detailed Project Underlining Importance Of Sleep For Children