Kuttner, of Woodford Green, Essex, denies conspiring with former NotW editors Rebekah Brooks and Andy Coulson and others to hack phones between 2000 and 2009.
He described accusations that he conspired with others to hack phones - allegations that ultimately brought an end to the Sunday tabloid - as "completely false" and "utterly baseless".
Kuttner told the Old Bailey he was aware of only one example of a NotW journalist being in possession of a hacked voicemail message - that of 13-year-old Milly, who was abducted and killed by Levi Bellfield on her way home from school in March 2002.
The 74-year-old told the court he contacted Surrey Police on April 13, 2002, saying the paper may have "significant information" relevant to the inquiry.
The information came from a voicemail on Milly's phone appearing to offer her a job interview
The message turned out to be left on the schoolgirl's phone erroneously by a recruitment agency who had contacted the wrong number.