Originally Posted by FirstClassSE

Penalties, Cancellations and Changes:

In accordance with applicable law, when passenger requests a change in their original travel itinerary, before or after its start date and within the ticket time limit, the airline will replace the ticket and may make adjustments in fares or exchange rates based on variations occurred within the ticket’s time limit. Passengers who do not use their ticket will be entitled, within its time limit, to a refund of the amount paid, subject to any applicable rules and penalty fees, and reimbursement of ticket purchased through promotional fare will comply with any restrictions stated in the conditions of its application. For more information, including information relating to applicable fees, visit our website: www.tam.com.br, Call Center + 55 11 4002-5700(Capital) or 0800-570 5700 (other locations).

I dont really understand what that means.. (the fat text.)