It comes just weeks after Katie posted a touching message on social media following her father's death saying "Words cant express the solace our family's received from all the love & support during this trying time".
The website reported that David's last will and testament stated that "while he has two children - Beau and Katie - any references to his "child or children" are only to Beau and not to Katie". I was her biological father but I didn't raise her.
David and Katie (who now stars on the TV series "Arrow") had a complicated relationship - she was raised by her mother, former model Sherry Williams - and David told PEOPLE in 2009, "Because I didn't raise her, I didn't have to parent her".
"She has a completely different life", he told the magazine. "She's very talented. It's hard for me to even accept how old she is now, like 30". Prior to his death, he finalized his will, and The Blast managed to obtain copies of the document.
Though they were never close, Cassidy said he was "proud" of the career has daughter had carved out for herself in Hollywood.
He went on to call son Beau "one of the best people you'll ever meet" and said he was a big help in the early stages of his dementia diagnosis.
The will was originally filed in 2004 and named his then-wife, Susan, as the personal representative under the will.
In a tweet after her father's passing, Katie Cassidy thanked fans for their well wishes and also revealed that Cassidy's final words were, "So much wasted time". Since they divorced in 2016, his cousin took over the role.