If you overstay in Paraguay or don't have an entry stamp when leaving, a fine applies. However, immigration agents will accept less if you pay in USD or BRL or sometimes even EUR. You won't get a receipt in this case, but it's a lot faster and cheaper. No issues when re-entering the country.
--Emilia
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If you're in Brazil and want to go to Ciudad del Este for a day or so, DON'T bother asking for an entry stamp. No one checks anyways and you literally have to ask the immigration agent if you want one
--Emilia
