Simon Dorante-Day, from Queensland has claimed since the 1990s that he is Prince Charles’ first-born child.
He believes new photos comparing his younger self and his alleged grandmother – Queen Elizabeth – prove it.
‘The courts consider physical similarities and genetic traits when looking at paternity cases, especially when DNA tests are not readily available,’ he told Seven News.
‘Of course I have a lot more proof than just photographs to back up my claims – and all of my research is checkable and readily accessible.’
Mr Dorante-Day was born in Portsmouth, UK, on April 5 1966 and was adopted at eight months old.
Both of Mr Dorante-Day’s adoptive grandparents had worked for the Queen and Prince Philip in one of their royal households and he claims his adoptive grandmother repeatedly and directly told him he was the son of Charles and Camilla.
Mr Dorante-Day’s case alleges Charles and Camilla began their close relationship in 1965, a year before his birth certificate says he was born.
He claims in the nine months before he was born Camilla was absent from the British social scene and Charles was sent on a trip to Australia.
Mr Dorante-Day’s case says Camilla kept him until he was eight months old, hiding him from the world with the help of the royal family and protection officers.
However by eight months he was growing too big to hide and it was arranged the daughter of a royal household staff member – Mr Dorante-Day’s adoptive grandmother – would adopt him.
Mr. Dorante-Day believes inconsistencies on his birth certificate and his name also prove he is of royal blood.
A historian has allegedly found the hospital listed on Mr Dorante-Day’s birth certificate did not deliver any babies during the entire decade Mr Dorante-Day was born.
Mr. Dorante-Day also claims the parents listed on his birth certificate are false.
He believes it was Charles and Camilla who named him.
He claims Charles and Camilla were close friends with a man named Simon at the time of Mr Dorante-Day’s birth.
Mr. Dorante-Day’s middle name is Charles, which he believes was given after his alleged biological father.
Dorante-Day claims he has memories of visiting a woman – who he believes to be Camilla – as a young boy in Portsmouth.
He has been fighting for Charles and Camilla to commit to a DNA paternity test since 2018.
He also said he ‘won’t rest’ until the royals see his case through.
‘My first court case was in 2018 and my legal battles continue to this day. I want to do this the right way, so that my family and I can finally get the answers we deserve,’ he said.
Under the photos comparing Mr Dorante-Day and the royal family several people commented they could see the ‘family resemblance’.
‘The eyebrows and their position above your eyes are another mirror image,’ one person said.
‘Those jolly genes are having a merry old time At all ages/stages, there is undeniable very strong likeness to your biological family,’ another commented.
‘The shape of the face on the sides and the bottom are very similar, and unique. That’s what struck me the most,’ another person wrote.
‘Hairline same! Eyebrows same! Noses same! Eye shape same!,’ another said.