noun
yellow card
In sports, a warning card shown by a referee for a foul or misconduct.
彼は危険なタックルでイエローカードをもらった。
He received a yellow card for a dangerous tackle.
noun
International Certificate of Vaccination or Prophylaxis; ICVP
Colloquial term for the yellow-colored vaccination booklet required for international travel; officially called 国際予防接種証明書.
海外旅行に行く前に、イエローカードを確認してください。
Before traveling abroad, please check your yellow card (vaccination certificate).