Furthermore, persons under 18 years of age who are not accompanied by their parents should bring a letter from a parent or guardian giving them permission to travel to Canada. These persons require a passport for travel to Canada and may require a visitor's visa. Visitor's visas for entry into Canada must be obtained at a Canadian Consulate outside Canada and cannot be obtained at the border. To be admitted to Canada, visitors must be in good health and law-abiding, have enough money to support themselves and their dependents during their stay, and have the means to return to the U.S. or to some other country. All persons other than U.S. citizens or legal, permanent residence of the United States require a valid passport or an acceptable travel document.
Some persons require a visa to enter Canada.
Visitors should direct their enquiries regarding visa requirements and valid travel document to the Canadian Embassy, High Commission or Consulate in their home country before departure for the United States. Applications for visitor's visas made to the Canadian Embassy or Consulates in the United States may result in delays. Foreign students and workers in the United States may encounter difficulties entering Canada without their passport and a Canadian visitor's visa if they are from a visa required country. Their status in the United States does not confer any status in Canada or give them the right to re-enter the United States. Visitors who wish to return to the United States after visiting Canada should check with an office of the U.S. Immigration and Naturalization Service before leaving the United States to make sure they have all the necessary papers to get back into that country.