It means your old man may have had his doubts about paternity and told ur mom "go be with that nikka"
Or
Ur dad was never there for your birth on some lemme know when you get home shyt
Or
Your parents were on hiatus and reconciled later which means your dad is trash because who leaves a pregnant woman
Or
It means he went home to shower during the certificate signing
Maybe your mother is a meek person who wouldnt force the issue of claiming you and ur dad may have been tired from a long delivery. Who knows.
You know what kind of folks ur parents are sonit shouldnt be hard to figure out