ok i seem to be in the small minority here that would say leave well alone. My biological father was having an affair at the time i wa being born. My mum kicked him to the curb but always left communication open so if i ever wanted to see him or visa versa it was always there. Growing up i know i asked to see him and my mum would duly arrange this. He would promise to be there. Only once did He ever turn up. It tore my mum to pieces seeing how much it hurt me. He knew of my existence but still didnt want to know. 20 years on i still think of him but know that everythin i have achieved to date is not down to my blood line but to the people that raised me my mum and my step dad. As far as im concerned my step dad has been more of a father to me than my biological dad ever was. He was just a donor. Sorry if this sounds harsh and not what you want to hear but sometimes things are just better left alone
He is asking for opinions from everyone so your post is just as and probably even more so relevant to the thread. First hand experience is so important. Great post
Sounds like you've had a pretty shit personal experience but I don't think it should put the annon poster off.
There's only one way to find out and that is make contact, how you go about it though I've no idea. Is it just a name you have ?