I am an illegitimate child. My biological father is married and has 4 children around twice my age - all have established businesses and are all married. He has given me his surname and is registered in my birth certificate as my father. However, I did not live with him nor with my biological mother. I was adopted by my aunt from my father's side and I've lived with them since I was 3 months old. I have never been legally adopted by them, though.
I would like to know if I have rights to my father's estates and what are the conditions for such. I have not communicated with my father on these matters as he has been bedridden for years due to old age (he is in his 80's). My half-siblings have taken charge of his assets. I am not aware if there is any last will drafted already.
How should I go about pursuing my inheritance? Would having a settlement with my half-siblings be a better and less time consuming step? I am also apprehensive since these matters might take time and a lot of money.
Thank you very much for your time and am looking forward to your response.