LoboMarino30

Hi mariovale,
I second the above suggestions, but can also add this for a fellow newbie going through Lima: Once your petition is approved at your service center, it'll be forwarded to the National Visa Center (NVC) and then on to the Peruvian embassy. Once received in Peru, the embassy will send out an informational packet to the Peruvian fiance(e), including an interview date (assigned by the embassy) and instructions for the medical exam and what papers to bring to the interview. I strongly recommend emailing or calling the Peruvian embassy if the Peruvian half of your couple doesn't get anything soon from the Embassy. I received notification of the petition approval on June 26th, and my fiance in Peru hadn't gotten anything by July 16th (and still hasn't; we're giving it until Friday before I bug them again), so I emailed the embassy to check on it. Just make sure you put your case number in the email heading, and be as specific as possible. They were very quick in getting back to me, although didn't answer all of my questions (they did, however, provide our interview date and said the packet had been mailed). Again, there's great advice on the Embassy's page here. Also, be aware that it looks like Peru has a tendency to lose mail, even from the embassy, so keep checking.
Again, the embassy page here is great, and tells you everything you'll need for the interview, so start preparing now. Good luck!