white card

Noun

 * 1) A card that has to be filled up when entering Singapore from Malaysia through the Johor-Singapore Causeway.
 * 2)  A citizen-owned automobile used as an illegal unlicensed taxi.
 * 3)  A mandatory card required in Australia to order to work on a construction site.
 * 4)  A card similar to the red card and yellow card, but used to acknowledge sportmanship or fair play.