The international ticket number is the one you are using to fly to Brazil or South America, and it has 13 digits (numbers only).
The Travel agency or Airline that issued your e-ticket should have sent you the itinerary receipt containing the e-ticket number, and the record locator. The record locator or “Booking code” is composed of 6 digits (numbers and letters) and is NOT the international Ticket Number.
The international ticket number should be easily found on the confirmation email you received, and might look similar to the one below: E-ticket number 074 2464639523
The international ticket number starts with the number of the airline you are flying to Brazil or South America with. On the above example, 074 is the number for KLM. If you need, check the complete list of airline numbers.
If you already have your ticket to Brazil or South America, and can not find the international ticket number, please contact the agency or airline that you purchased the ticket from.