Hope it's ok to post this in here, pondered for a while which section to ask this in and thought I might get most experience here. I'm dd's RP and due to marry DP, dd's step-father, next summer. As far as we're all concerned we're already a family but it would be great to make it 'official' too. DD would really like to take on DP's surname, so we'll all have the same surname and, from experience (as she still has her 'father's' surname legally) it would make things a lot easier.
DD's 'father' (I use inverted commas with good reason, history of DV and doing absolutely nothing for dd) hasn't seen her since she was 9 months old and that was literally a passing meeting, he hasn't actually seen her for more than a few minutes since she was 4 months. I can honestly say I've done nothing I shouldn't have to block contact (he'd disagree though as he counted not letting him take a baby off for unspecified hours to an unspecified place as denying contact), he just got annoyed at me 'calling the shots' (again, such as inviting him to come and see dd at home rather than taking her out, and cancelling contact when she was poorly) and never made contact again. I didn't pursue him either but he knew where to reach us and that I wouldn't stand in his way.
DD is nearly 12 now and obviously doesn't know him at all, she had a couple of brief periods of wanting to try and find him, fantasising about him being some wonderful dad, but I tried to look him up and couldn't find anything (very common name and had no idea of area as he moved away soon after breaking contact). Since then she's decided she's not bothered as we're a family now but, privately, I have managed to find an address for him (thanks to a past acquaintance mentioning the area).
Sorry for long backstory but the issue is that, as far as I've read, to get permission for a name change or for the step parent to share PR or adopt DC, you need the consent of both parents with PR, and I'm not sure how he'd react to that. Can see him either being affronted by it and using the opportunity to get back into our lives to try and put a spanner in the works, which would be horrible for dd, or being fine with it as if I understand correctly, it would cut off any chance of claiming maintenance from him and let him off the hook. (if it helps, we've had no maintenance at all, ever, from him - had to claim for it under the old IS rules when dd was about 5-6 and a woman from CSA got back to me to say he'd told her if I pressed for maintenance he'd press for contact so when they offered to let me drop the matter I did)
So seeing as they probably couldn't trace him on their own (am I obliged to share info I have, seeing as he hasn't provided me with it or anything, I just googled based on scant info?) would that count as not being able to get hold of him and they could go on dd's wishes alone and allow name change/PR change? Or for safety's sake should we leave it a couple of years? Or apply to court and cross our fingers he's not bothered about making trouble? Not sure what to do.