回複：請教個位老師有關父母綠卡問題

剛收到簽證中心的兩封信，要求交88元擔保申請費。兩個invoice number分別屬於父母一人一個。我先付了一個，receipt 上顯示 1

Fee for two related case. 請問兩人要各交一次，還是一次管兩個。
-It seems one fee for two cases, but you had better call NVC to confirm it (tell them your receipt showed one fee for two related cases, and whether it is true).