mine is not resident fare . Was at the EZE airport early and since there was not a line, I went to the check in counter . She asked if I wanted to check my bag in and I told her it is a carry on . I asked if I needed to check in if I already have my boarding psss and she said ‘no’. My bag was not weighed It didn’t seem like she was concern about my bag .. At the gate I saw people with bigger bags then mine . I recall reading on Reddit that some people pay for residency fare and would get away with it if no checked baggage . At boarding gate ,I had to show my ID and boarding pass .