What is the fine-grained topic of the following text: But later, when you'll be leaving Brazil by any other border (I'm assuming your passport is not Brazilian), you need to have stamped Cartão de Entrada e Saída (Entry / Exit card), not having it may be a big issue with Policia Federal, which are rather infamous for their bureaucracy and being petty. Only return the topic.
The necessity of having a stamped Entry/Exit card when leaving Brazil