Farmers on WA's south coast say unattended roadside stalls are making healthy profits despite vulnerability

Roadside farm stall holders say the honesty payment system works. (ABC Great Southern: Sophie Johnson)

Farmers in Western Australia's south have credited "extremely honest" consumers with the rise in unattended roadside produce stalls across the region.

Over the past few years, the number of unattended farm stalls set up near Denmark has grown substantially.