.... If it's not on a birth certificate, I think you can put on your tree what you have been told, just add a disclaimer that that this is what you have been told. People are within their rights to comment that they disagree but i don't think it should be taken down.
Marie, I gather you are referring to family tree charts uploaded to various websites ? These are of course, written up from the point of view of the tree owner, sometimes with a great depth of understanding of the bdm official records supporting their family members. HOWEVER, sadly, sometimes those uploaded trees seem to show the tree owner is without a full understanding of the impact that mis-leading or scant information can give to even less experienced family history researchers.
May I please gently suggest I suggest that even if the father of a baby is named on a civil registration, that does not actually prove he is the biological father, regardless of if the parents were legally married to each other.
If the woman is a married woman, surely all it proves is that SHE recognised HIM as her husband? Surely civil law for much of the 19th and most of the 20th century recognised the husband of the baby's mum as the lawful father, even if he was not part of the family in the year or so before the baby's birth?
Surely info on a tree chart only provides info that the researcher believes to be factual, sometimes based on official records, sometimes on independent sources (BDM announcements in newspapers) sometimes based on oral history, sometimes based on family records (birthday books, entries in family Bible), sometimes based on 'twaddle' (Guestimates, putting two and two together but getting five, or completely mixing up generations or neighbours with similar names, or worse !) .
I firmly believe that 'twaddle' ought to be removed from any family tree as soon as it is questioned and exposed as twaddle. I believe oral history and official records both have their place in family history, but as to twaddle ..... it is an adverse mark on the research skills of the tree owner who uploaded it.
Cheers, JM