Since last year's Ashburton shooting the number of assaults on Work and Income staff has doubled, newly released figures show.
The numbers, obtained by Radio New Zealand under the Official Information Act, also show a growing number of beneficiaries trespassed from Work and Income offices for threatening behaviour.
In September last year, Ashburton Work and Income workers Leigh Cleveland and Peg Noble were killed and another staff member was injured when they were shot, allegedly by gunman Russell Tully.
In the year to June, 46 Work and Income staff were seriously assaulted and 413 people were trespassed for threatening behaviour.
This compares with 2013/14, when there were 22 assaults and 163 trespasses, and comes despite beefed up security at Work and Income sites, where 250 extra security staff have been employed.