evidence: Step-parents and others taking a parental role that are not defined as either a ‘mother’ or a ‘father’ for nationality purposes must not fill in their details in section 4. [...] No mention of parent’s details or ‘mother or parent 1’ and ‘father or parent 2’ will appear on the passport. This information is used simply to gather the information we need to issue a passport. [...] - Parents’ passport at the time of applicant’s birth - If fathers passport, the marriage certificate between applicant’s mother and father is needed.