A system, policy or understanding based on trust in the honesty, honor, or integrity of others
Our local beekeeper leaves jars of honey for sale in his driveway. There's a coffee can for the money, and payment is on the honor system.
An honor code or honor system is a set of rules or ethical principles governing a community based on ideals that define what constitutes honorable behavior within that community
A set of procedures under which persons, especially students or prisoners, are trusted to act without direct supervision in situations that might allow for dishonest behavior. an agreement between members of a group to obey rules, although no one checks to make sure that they are being followed
a system of conduct in which participants are trusted not to take unfair advantage of others; "the students are on the honor system