Officials dismissed her case just days after her family issued a statement accusing the young woman of having psychiatric problems.
Police in Poland have issued an official statement regarding Julia Austyna assertions that she is Madeleine McCann.
The British youngster was taken from her family’s holiday apartment at the age of three in Praia da Luz in 2007, and investigators have been searching for her ever since.
Ms Wendell recently appeared on Instagram, showing what she believed to be proof that she was, in fact, Madeleine, and even went so far as to say she does not think her parents are biologically related to her.
Despite documenting body markings and a rare coloboma in her eye, which matched the kidnapped three-year-old, Polish police have now dismissed her claims entirely.
Officials dismissed her case just days after her family issued a statement accusing the young woman of having psychiatric problems.
After meeting with Wendell’s biological family, investigators “ruled out” her assertion, according to Pawel Noga of the Provincial Police Headquarters in the western city of Wroclaw.
Mr Noga told the Polish news source Gazeta that Wendell’s relatives had shown authorities a birth certificate and photos in a desperate attempt to stop the media frenzy.
Her family made a statement on a missing people page on Facebook last week, alleging that the 21-year-old “lies and manipulates” people and is not taking the medications recommended by her psychiatrist.
“[Julia] used to want to be a vocalist or a model,” they said in a statement.
“She had always desired to be famous. What’s more, she now has 1 million fans.
“The internet will not forget, and Julia is clearly not Maddie. We are devastated by the present situation”.
Ms Wendell also left home and refused therapy in recent weeks, according to her relatives.
The 20-year-old based her initial claims on “something” her grandmother had mentioned about the McCanns previously, and she also claimed to have discovered a family picture of a man who allegedly assaulted her as a child.
She claimed that he looked exactly like a composite sketch of the suspect wanted for kidnapping Madeleine which was posted on the official website.
“I have similar eyes, shape of face, ears, lips, I had the gap between the teeth,” she detailed in one of her early posts on her Instagram account, @iammadeleinemcann.
“I need to know the truth. I need [a] DNA test and I need to talk with Madeleine’s parents. Help me!”
Although there were mentions of a potential plan for a DNA test to be carried out with Wendell and the McCanns, they were abruptly thrown out after her claim began to unravel following widespread scrutiny online.