If it is "entitrely discretional" what are the chances you would be told your FBI report is OK even though the date of issue is not past six or nine months when you ask the first time and be told it is not acceptable when you actually submit the papers (even if it is
within an unwritten and unofficial grace period) ? What are the chances you would even be able to ask the same person?
Given the fact that you have already overstayed your tourist visa I would not go to migraciones in person to ask them anything. It is quite likely they would ask to see your passport and discover the overstay. Depending on how "strictly" they are "enforcing" the DNU 70/2017 you could be subject to arrest.
Perhaps this is something your Argentine wife can ask with a phone call. At the least, I suggest you wait until Dr. Rubliar provides the latest information regarding the current level of enforcement. I'm inferring from jenis' post that an FBI report that was issued more than nine months ago would probably not be accepted.
It's been quite a while since I researched the subject, but the last information I had was that it is possible (if not required) to request the "certification" of the FBI report by the State Department when you first request the report. I don't think they the term Apostille, but that may have changed in the interim.
My advice is to be "as sure as possible" that you have ALL the paperwork you will need when you go to migraciones to apply for the permanent residency. If a "certificado de domicilo" is one of the requisites, I don't think it's likely you would be arrested while they send the police to check on your address.
If your FBI report is up to date, has the Apostille and is translated and legalized I don't think you will have any problems. Hopefully, you'll only have to pay the overstay fee and the fee for the permanent residency. If I were you I wouldn't go to migraciones without the number of a good "immigration" lawyer who knows who you are and would be "available" in case you had to make a call. I certainly would NOT go based on the advise of anyone in this forum who is NOT an "immigration" lawyer in Argentina, including me.
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