https://www.canada.ca/en/immigration-refugees-citizenship/services/visit-canada/eta/facts.html Travellers who are exempt from the eTA requirement. U.S. citizens are exempt from the eTA requirement and must carry proper identification such as a valid U.S. passport. Lawful permanent residents of the United States who hold valid status in the U.S. are exempt from the eTA requirement.
好像不需要 Travellers who are exempt from the eTA requirement. U.S. citizens are exempt from the eTA requirement and must carry proper identificationsuch as a valid U.S. passport. Lawful permanent residents of the United States who hold valid status in the U.S. are exempt from the eTA requirement. They must carry official proof of status (or an equivalent status document) and a valid passport from their country of nationality (or an equivalent travel document). See the complete list of documents for lawful permanent residents of the U.S. https://www.canada.ca/en/immigration-refugees-citizenship/services/visit-canada/eta/facts.html
谢谢回复。所以是应该ETA填写一下，然后就得到一个number吗？
那还需要填写ETA吗？
不需要 有的柜台工作人员不是很清楚绿卡， 你就告诉他绿卡进加拿大是不需要签证的 有时候会换一个高级别的主管就会弄了
Travellers who are exempt from the eTA requirement. U.S. citizens are exempt from the eTA requirement and must carry proper identification such as a valid U.S. passport. Lawful permanent residents of the United States who hold valid status in the U.S. are exempt from the eTA requirement.