I was only trying to renew my 90 day tourist visa and they simply told me that was not an option. Again, I'm not sure if this is really the case now or if I encountered misinformed employees (although I ultimately talked to about 5 of them...)
Also you can tell they are undergoing changes because when the woman in front of me asked about prices (for other services) the employees had to go get a printout with the new prices that they all seemed completely unfamiliar with.
Also I have read that even if the renewal at the immigration office is still possible the price is now 300 pesos there as well- meaning going to uruguay(a bit cheaper), paying the multa, or doing the renewal is all about the same price.
I will probably leave the country sometime simply traveling before eventually returning home but does anyone know if the multa is only accepted in cash, at the airport, going to Uruguay, etc.? I'd rather not have to take lots of cash to the airport any not use it if I have to change it later...
who knows....