Purchases made at the Duty Free Dufry stores in the airport (departures), or at the aircraft free shop, are deducted from the passenger's foreign purchase allowances, which is of US$ 500.00.
When the passenger arrives in Brazil, he/she will be exclusively entitled to an extra allowances of US$ 500.00 for duty free purchases (arrivals).
Combining the two allowances, so as to justify the acquisition of a product having greater value, is not allowed.