Нельзя так безапелляционно что-то заявлять, не имея о предмете разговора ни малейшего представления. United States citizens and permanent residents: You do not need a visa to visit or transit in Canada if you are a United States citizen or a person lawfully admitted to the United States for permanent residence who is in possession of their alien registration card (Green card) or can provide other evidence of permanent residence.http://www.cic.gc.ca/english/visit/visas.asp