Child Youth and Family are disputing that Wairarapa social advocate Trevor MacKiewicz called their service with concerns about 2-year-old Caleb Skinner, three days before he was assaulted at his home.
Mr MacKiewicz told the Times-Age he called CYF on February 28 after he had noticed bruising and scratches on the boy's face.
On March 3 Caleb was airlifted to Starship hospital with severe head injuries. A man will appear in Masterton District Court on March 27 charged with assaulting Caleb.
Child Youth and Family co-ordinator Marion Heeney said they thoroughly searched their records and found no trace of Mr MacKiewicz's call.
"Based on the number given to us by Mr MacKiewicz we checked all calls to our national contact centre an hour either side of the time he told us he called.