It would be a couple of years ago at least when my wife and step daughter got dual citizenship and new passports so things may have changed since. I do remember getting to the embassy early and we took all the identification documents we had with us. We didn't finish there until after 4pm having got there about 11:00am. I seem to remember taking loose change for the photocopier, plenty of cash, a pen and pre paid special delivery envelopes so you can get the new passports sent to you. Sorry can't remember much else, maybe someone else on here has done it recently.