If you do want to help her give her a photocopy of passport or an old passport (that's what my friend's brother gave him)....out of interest though, how near 16 is she (i.e. almost 17 or near turned)...I don't think going out now and then is a problem but if its all the time as it can become at that age you need to talk to her.
I used to go out at that age, but I had done in my ankle and could'nt play my favorite sport and since I had soo much time on my hands I used to go out more than usual (not really over the top but too much for an athlete), and what got me back into line was when my physio finished (after like 10 months) and he said go for a run and ebfore I had done 3 miles in a decent time, this time I was dying after like a mile!!! And I got my fitness back together.....anyway now I still go out but far less frequently (very occassionally in fact) and there's no harm in it.....but make sure she's careful, always stays with a group etc etc etc. Better to be open with her and keep her safe than risk something.....i dunno what its like enar you but near me a lot fo boys and girls go out into town (like year 11 upwards) and drink etc. but not all the time. Its cool, as we know a lot of people and usually most people from our school go to the same club when we go out so its nice......Anyway don't worry as long as its not excessive and as long as you tell her the dangers and tell her to keep safe and make sure she doesn't suffer academically or sporting wise I don't think its a problem