I agree with CaroleW. I don't think the minister or registrar would normally ask if a father was deceased, but would note that fact if it was volunteered. I have a few instances in my ancestry of brides and grooms making up fathers' names (not both on the same entry, but often one or the other). In my grandfather's case, he didn't know who his father was, as he had been orphaned at a very early age and brought up by the local authority, but I suspect he didn't want to have "unknown" appear on the certificate.
In a couple of other cases, it appears to have been a deceit perpetrated when committing bigamy.
In general terms, whilst images and other copies of original documents are the nearest we can get to what was recorded at the time, it doesn't necessarily follow that what was recorded is true. We need to use the information in conjunction with other records that may agree or disagree in certain particulars, to assess the facts.