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Subtle Changes in Behaviour

Tokyo: Passmo_1
 

For the Pasmo contact-less travel card used around Tokyo. From their blurb: “Do not stick labels or anything similar on the card, as this may cause the card to jam in ticket vending machines, fare adjustment machines or the like and may damage the card” How to support personalisation for this frequently used object?

“Do not give it to other people”. Travel cards tend to have a primary single user, whereas carried cash frequently changes hands. Given that Pasmo can be used for travel and is a cash replacement, are people more likely to share a Pasmo card with other people?

And given that the card should not officially be personalised, to what extent does this support sharing behaviours? Whether to inherently support wear-and-tear uniqueness?

Tokyo: Passmo_2

Tokyo: Passmo_3