"I would love to finally meet my father. I think it's been long enough.
"You see little kids around with their dad and you kind of want that relationship. I've always wanted to meet my Dad," she said. "My Dad walking me down the aisle has always been something I've thought of."
Forster also wanted to learn more about her Dad's Samoan heritage.
"I've been brought up around so many different cultures, but I know more about them, than my own Samoan culture. I'm nearly 21 and I don't know any Samoan at all."
Forster asked those who read her post to share it - in the hopes it would help her find her long-lost father.
"If you read this can you all please LIKE and SHARE, I really need this to be SHARED and LIKED as I need this this to get around."
On the online petition, Forster's friends wrote: "A young woman such as Ana has a lot to gain from having questions about her history and individuality answered as early as possible, before the passage of time risks some of the sought after answers being harder to obtain or even lost."
Anyone with information on Forster's father, should contact her on Facebook.