Thanks, I'm buying the first round, or pound

Anyway, in my slice of this experience Correo Argentino did not send an e-mail. Did they actually attempt delivery? I have my doubts. The only way I knew about the attempted delivery was from a Tramite number I was given at 468 Jujuy by the cryptic clerk who gave no explanation what to do with the Tramite number. One day poking around for answers on the government website I found a link to Correo Argentino, at the page it required a Tramite number. Well, I had one, entered it and by sheer co-incidence could see that they had just "attempted delivery" and the address was Invalid at it was being returned to the DNI maker. That led me back to 468 Jujuy where they told me to wait 15 days, it would be returned to 468 Jujuy. Total Sherlock Holmes.
So yes, I'd say yours should be waiting there for you when you return. 15 or so days after the attempted delivery. Cheers.
One curiosity to note. I had gotten a CUIL after I received the Precaria, some time ago. Today, looking at the back of the DNI there's a CUIL number. Different from the CUIL I got with the Precaria. Remains to be seen what hiccup that will or will not cause.