Canada is changing the rules for nationals of those countries who did not previously need visa to fly to Canada. The new visa rules will require those foreign nationals to apply for electronic travel authorization online by paying a processing fee of $7. The eTA will be valid for 5 years or the validity of the passport. You can learn more about how to apply for Canada eTA here.
Citizenship and Immigration Canada has posted warning on its website to beware of the scammers who have created fake websites to apply for eTA online. Some has the application form on their site asking personal information including the credit card information. Some are claiming to be provide service to obtain eTA for a service charge.
Please note that the only CIC website http://www.cic.gc.ca/english/visit/eta-start.asp is the official website to apply for Canada eTA online.
While searching online for eTA website, I came across a site called Canadaetavisa.com. It makes you believe that you are applying for Canada eTA and ask you to provide your credit card information. This site is fake and no one should ever provide their personal information.
There is no contact information on the website. It asks the applicant to input the credit card information without even providing the amount for which the payment is being made.
Here is another website you should avoid https://www.canada-eta.ca/. It looks more professional but not authorized to provide services related to Canada eTA.
The best way to avoid scam is to stay away from these websites and go directly to the Citizenship and Immigration Canada website to apply for Canada eTA online.
If you know any other website that is offering Canada eTA services and asking for credit card information, please share those in the comments.