overstaying a visa in brazil may result in deportation and fines to be paid at re-entry in brazil - and can also result in re-entry or future visas being denied.  

typically, when overstaying a visa a passport is stamped on exit, and re-entry into brazil can result in a fine, can be denied, or both - so it is important never to overstay a visa.

travelers wishing to transform their visit in brazil into a legitimate permanent stay, can do so by applying for the proper visa - depending on the individual's status, there are paths to getting work permits and work visas, as well as student visas for those who decide to study in brazil.