Hi folks, I am in a similar situation but I can't find any answers for my questions...
I have overstayed my tourist visa for almost two years. I want to get married with my Argentine girlfriend and after that apply for permanent residency. What type of problems on the way could we expect since I am here illegal?
I suggest that you and your girlfriend go to the comuna/registro (wherever you go to get a marriage license) asap to find out if they ask for (or demand that you have) a valid 90 day visa. If that's not a problem you can go ahead and get married as soon as you want.
If they
insist that you have a valid 90 day visa
and if you're from Europe, the USA, or Canada
and you don't already have a lot of stamps in your passport and or a number of overstays, you
could make a "visa run" to Uruguay. I don't think anyone from Europe or the USA or Canada has ever been denied reentry, including someone who recently made the visa with a lot of stamps in their passport.
If you you cannot get married
without a valid 90 day visa and decide to make a visa run it's probably a good idea for your girlfriend to go with you.
After you are married you can apply for permanent residency. However, based on Dr. Rubilar's recent advice, you might also want to apply for citizenship at the same time, provided you've had an uninterrupted physical presence in the country for two years (or will have by the time your citizenship is granted, about a year later).
If I were in your shoes I'd apply for the citizenship first, especially if you are unable to get a new 90 day visa
and if applying for citizenship would give you some protection against being deported by migraciones (as unlikely as that may be).
If marriage is no longer an automatic reason for the court to grant citizenship you may still be able to qualify for it. You'll know a lot more after you visit the court that has jurisdiction where you live. If they won't accept you application for citizenship without a DNI you'll probably need a lawyer just to get the process started.
As always, Dr. Rubliar is welcome to add to or correct anything I've written.