Kathryn Mayorga's team have been hunting for the Juventus and Portugal star's Italian home since October when United States police reopened the inquiry.
Referring to the person originally hired to serve the summons, the documents allege: "Records go blank when he searches anything for Ronaldo. Property records have been blacked out".
The Juventus forward emphatically denies claims he attacked Mayorga at a Las Vegas hotel ten years ago.
According to the Daily Mirror, Kathryn Mayorga's lawyers have now been able to track down the full address of Cristiano Ronaldo's house in Italy, and have enlisted Italy's Central Authority to deliver summons and complaint.
Last month, with time running out and her legal team struggling to find someone to track down the Portugal national team captain, a USA judge allowed an extra 180 days for the summons to be delivered.
At first, Kathryn claimed she accepted £295,000 in a "hush money" settlement with Ronaldo "because she felt intimidated".
She declined to reveal to police the name of her alleged attacker and the case was shut.
But it was reopened previous year after she told cops for the first time the identity of her alleged attacker.