Proof-of-payment
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Proof-of-payment or proof-of-fare is an honor-based fare collection system used on many public transportation systems. Instead of checking each passenger as they enter a fare control zone, passengers
POP payment terminals in New York City, used for Select Bus Service lines.
Ticket hall with open barrier line in Niittykumpu metro station, Espoo, Finland
Honor system
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An honor system, trust system or honesty system is a way of running a variety of endeavors based on trust, honor, and honesty.
Proof-of-payment
…Proof-of-payment (POP) or proof-of-fare (POF) is an honor-based fare collection system used on many public transportation systems. Instead of checking each passenger as they enter a fare control zone, passengers…
Plants available for sale in Philadelphia using the honor system.
These handheld scanning devices allow customers to scan their own groceries while shopping. Such activity is not closely monitored by employees, and is therefore an honor system.
Example of the honor system at an unmanned Gandhigiri Shop in Mumbai, India