at times, certain documents can be requested by the airlines before authorizing boarding a plane directed into brazil, especially if travelling with a one-way or open ticket without without a visa.

a return ticket or a ticket for another destination outside brazil dated less than 90 days from date of entrance into brazil is generally required - this can be requested by both airlines before departure, or by the federal police upon arrival.

an address while staying in brazil is also required, and typically included in the form filled before arrival - this can be a hotel or an apartment.

while rare, at times, sufficient funds for the duration of the trip must be shown, could be in the form of cash, credit cards, or even bank statements depending on individual situations.