Music rights row splits family
or royalties and the ownership of master tapes for some of Dana's albums.
The case, details of which emerged in Ireland for the first time yesterday, involved the Heart Beat record label, which Ms Stein helped run to distribute Dana's music to a US audience.
A private settlement was agreed following the court proceedings, which involved the continued payment of music royalties to Ms Scallon.
Relatives said Dana was supported in the US dispute by her brother John (57), who is also her campaign adviser, while another brother Robert (69) sided with Susan.
Ms Stein also stood over claims she made during the court case that her sister had taken out US citizenship prior to her first tilt at the presidency in 1997.
She said a decision was made that Ms Scallon would not reveal her US citizenship during that campaign unless asked, as it was feared that this could hurt her chances.
Ms Scallon denied her sister's claims last night.
However, she was unable to provide conclusive proof of the date she received citizenship.
In a statement to the Irish Independent, she insisted that she did not become a US citizen until 1999.
"My US passport was renewed in 2009. It is a 10-year passport expiring in 2019. The US issue a standard 10-year passport. My first US passport was issued in 1999," she said.
Ms Scallon said that she had made it clear to US officials that she could not renounce her Irish citizenship.
Meanwhile, Ms Scallon's brother Robert Brown told this newspaper that family members had been involved in a dispute over the ownership of their mother Sheila's home in Derry after she passed away in November 2009.
"She always said she'd leave that home to us all for us to share but that didn't happen because the family was split over it," he said.
"The house was lying empty since but has since been let whilst this is all sorted out."
Mr Brown, who lives in Birmingham and needs dialysis three times a week due to kidney failure, said he too had grown apart from his sister.
"I supported Susan in her dispute over in America and that probably hasn't helped," he said.
Another sister, Eileen (68), who still lives in Derry, also confirmed there was a dispute over the ownership of their mother's home.
"I am the executor of my mother's will and therefore cannot comment, but yes it has split the family apart. It is awful," she said.