honor system

American  

noun

1. a system whereby the students at a school, the inmates in a prison, etc., are put on their honor to observe certain rules in order to minimize administrative supervision or to promote honesty.

---

Etymology

Origin of honor system

An Americanism dating back to 1900–05

Example Sentences

Most notably, visitors can still purchase books lining the shop’s exterior walls at any hour of the day on the honor system — they simply place their money in a slot box on the front door.

From Los Angeles Times

“It’s an honor system. It’s how we live. It’s how I’ve lived my life,” he said.

From Seattle Times

It’s the long-standing traditions, like selling some books on the honor system.

From Los Angeles Times

Law enforcement has to rely mainly on the honor system when serving firearm surrender orders.

From Seattle Times

“We were working on the honor system, and relying on the honesty of our shoppers and the people in our stores,” Ms. Staib said.

From Washington Times