Careful. Scammers!!!!

Be aware of a scam!!!!!

There's a girl with the sign of VISITAX next to the boarding pass, telling people scan QR code. She is presenting this as a requirement from the government. It's 20CAD per person , taxes from visiting a country. I asked a boarding officer what is it and they say it's ok it's just a payment for visiting a Mexico from the government. I said that it looks like illigal and I'm not going to pay, and officer said Ok don't pay if you don't want. WTF???? I entered the fake name and information and it was passing through as far as I'm going to make a payment from my credit card