Thanks for that.
I have an interest actually since a friend of ours is in a similar situation.
She found out that what the father had actually signed was an admission of Paternity in lieu of the affidavit of acknowledgement. The purpose of affidavit of admission of paternity is for the support and succession only, and it does not entitle the illegitimate child to use the surname of his father.
Perhaps your fiancee has the 'Affidavit of Acknowledgement and Consent to use the surname of father' also.
Would you be kind enough to enquire with her?
I am trying to help out our friend on the best way to get a minor's passport without that affidavit of consent.
Would really appreciate