Other documents as may be required by the counselors
Thats the bit that can catch people out.

Husbands divorce papers
Photo(s) of you and hubby together - my wife just showed them a pic or two on her mobile phone.

They also ask things like husbands address in the UK, husbands company and work address etc which me and my wife rehearsed beforehand. Or alternativley write the info down or take docs with the info on. It sounds a bit daft but they do seem to ask for this stuff without warning you beforehand. Also my wife texted me for at least one bit of info (about 3 am UK time )