Up to 700 people have claimed to be Prince's half-siblings in a race to stake a claim on the star's $300million fortune.

Hundreds of people have come forward since the death of the Purple Rain singer two weeks ago.

Harvey Morse, of Morse Genealogical Services, told the Daily Mail they were busy sifting through an enormous amount of claims.

"Our phone has been ringing off the hook, I would say we have received between 600 and 700 calls," he said.

(Image: Getty)

"They run the gamut, literally from 'We lives in the same area so we must be related', to 'We have pictures of Prince at our family reunion.'

"But I like official documents. Birth, marriage, death, divorce certificates, census records, that sort of thing - papers that were drawn up without any thought of this eventuality."

It comes as a judge has ordered a DNA sample of the late singer be taken to determine the legitimacy of claims.

Lawyers charged with untangling his multimillion-dollar fortune can get a sample of his blood from the coroner.

TMZ reports that there’s a sample of the Raspberry Beret singer’s blood is currently being held at the Medical Examiner’s office for testing.

(Image: PA)

The decision comes after a man claiming to be the secret love child of Prince began legal proceedings to prove his paternity - and could inherit a slice of Prince 's multi-million fortune if the allegation is found to be true.

Heir Hunters International has confirmed it is working on the case of an unidentified man in his 30s whose mother allegedly had several liaisons with the Purple Rain singer in the 1980s and according to them he's got a strong case.

The singer, who passed away on April 21 age 57, died without a will or an heir leaving his fortune to be divided up between his nearest relatives.

At a probate hearing in Mineapolis the judge avoided putting a number on the estate's value, though some estimates have claimed it is $300million.

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John Hilbert and Shar Mansukhani from Heir Hunters International revealed they were inundated with calls and emails from people claiming to be related to the popstar but that the man's case stood out.

"We have a standard protocol. We want a certified copy of your birth record and we also want a detailed description of why you think you would be related to Prince,” Hilbert told RadarOnline. "It added up with where Prince was and where his mother was."

The alleged man is in his 30s and lives in the Midwest according to the Heir Hunters and when he contacted the organisation claimed his mother had several encounters with Prince during the 1980s.

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According to the duo the man didn't seem "crazy" and said there was something about the man's case that stood out: "The way we approached everything was just completely different than what we had seen. He wasn't looking for that 15 minutes of fame. It wasn't a crazy story and it really started piecing together.

"He's very nice, not crazy. He’s somebody who's not star-struck crazy or wants to be famous. Not at all."

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Admitting they were still at the "beginning stages" of the investigation, they said the man would rather stay anonymous and would stay away from court proceedings.

"He values his privacy,” Hilbert said.

“He does not want to show up on the courthouse steps unless he is certain that the procedure is set that he'll be recognised."

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For now, he plans to stay away from the current court proceedings, but likely will come forward after more research is done, they claimed.

"We're at the beginning stages in a way,” Mansukhani said.

“Before we move forward we've got a lot more investigating to do, because we're sticking our reputation on anyone we would bring forward. We're just going to make sure we do everything that we can to solidify his claim."

It will take around 90-120 days to establish if Prince is the father of the man.