Before initiating the application process for an eTA Canada, travelers should check if they meet all the requirements to complete the procedure without issues.
Canadian eTA is available only for citizens of eligible countries - those who have Visa Waiver Agreement with Canada. The eTA to Canada is not issued for Canadian citizens and those with dual citizenship, permanent Canadian residents, and nationals of the United States.
People willing to apply for an eTA to Canada must prepare the proper documentation: a valid passport. Furthermore, a US nonimmigrant visa/a Canadian visa in the past 10 years is required for citizens of countries who only recently became eligible for electronic travel authorization to Canada - for example, the Philippines.
Review the requirements to apply for an eTA Canada and make sure you meet the criteria.