Alert me if I leave my card behind

[Rika (Scarlet)]

Previously discussed in this linked thread but the complexity and cost this feature would add to the card makes it unfeasible.

Location technology for lost cards?

Problem is, cards are ridiculously thin and the whole tracker with battery is significantly more expensive than a dumb card. Trying to fit any kind of battery technology in there and still have it fit in card terminals or ATMs would be very difficult.