More than 30,000 New Zealanders had their benefits cut last financial year for travelling overseas without letting officials know.
Ministry of Social Development figures show 31,714 people had benefits cut for going overseas without telling Work and Income - down on the previous year's 35,565.
Benefits related to jobseeker support were those most often cut.
Whangarei Citizens Advice Bureau co-ordinator Moea Armstrong said some people received a "nasty surprise" if they went away for a week then came back and realised they had no benefit.
She thought the main reason people failed to tell Work and Income about their travel was that they were unaware they had to.