Visa or ETA or Electronic Travel Authority. An Electronic Travel Authority ETA is a entry prerequisite for those citizens who do NOT require paper stamp Visa in other words visa waiter nationals going to Canada via Airplance. An Electronic Travel Authority is electronically connected to your Passport. It is a short term Visa for Canada. It is valid for period of five years or until your Passport expires, whichever is sooner. If your passport is lost, stolen or damaged or renewed, then you need to apply another Online Canada Visa or ETA. With a valid Online Canada Visa or Electronic Travel Authority, you can fly out to Canada multiple times for short stays (ordinarily for as long as a 180 days or six months per visit). At the point when you show up on the border of Airport, an official will request to see your Email