white card

Short definition from Wiktionary

Noun

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