The Featherston Work and Income NZ service has been closed for the past seven months and it is not known when it will reopen.
Winz had a satellite site housed in the Featherston Community Centre running two days a week but it has been shut since September last year, when two front-counter workers were shot dead at Ashburton's Winz office.
Russell John Tully, a client of the social service, has been charged with their murders and Worksafe has also charged the Ministry of Social Development with failing to take all practicable steps to ensure the safety of its employees.
Katie McRedmond, social development regional commissioner, said all 29 satellite sites were closed after the tragic shootings.
"The Featherston site will remain so as MSD continues to assess its overall security approach.