I have been interested in accounts that sometimes appear in Family Tree about lack of/ incorrect birth certificates and the problems it causes.
Living in Spain, I am unable to pop to the local record office or churchyard! However, to follow are the details of just such a research problem now solved (see also FT August 2023).
My acquaintance Phil asked whether the birth name of his mother Doris could be found. This was a strange request until he told what he and his sisters knew. It took over a year to solve the mystery.