My family's search began when my grandmother reached retirement age (early 1960s). Apparently, there was no proof of her existance. Her mother had always told her that when she was born (1902), there was no legal requirement to register births. Tosh, of course.
Back then, tracing family history was difficult. The powers that be accepted other evidence (plus an affidavit, I think) and she was eventually granted a pension.
My mother attempted another search in the late 60s or early 70s - to no avail. She started again a couple of years ago and that is when I became involved. My grandmother was born in a workhouse and no father is recorded on her birth certificate. The man who she had thought was her father married her mother a couple of years after she was born (and at the time of her birth, he was living at the opposite end of the county). However, as far as we are concerned he was her "real" father if not by blood.
We have a couple of candidates for the 'blood' father but, short of surrupticiously pricking people with the same surname with a pin and doing DNA tests, I don't think we'll get very far.
And in the long run, does it really matter? As far as my grandmother was concerned, the man she knew was her father and, my mother thought was her grandfather. As has been mentioned elsewhere on this site, there are so many illegitimacies that we are probably all taking the wrong routes somewhere along the line.
Anyway, to get back on topic, this is what got me started. That, an interest in history and a penchant for research. Oh - for heaven's sake, I'm nosey!!!
Deborah