Oh, come on guys. Get a grip.

Have you ever had any teaching in regards to Ethics???
You are not permitted by law to disclose ANY information about patients. That's it.
Written consent can be given by the patient or by a patient representative. Who's got POA? Who is next of kin?

And as to other ways of proving competencies: you can always make up case scanarios, or get copies of your performance appraisals, reflective practice sheets, SWOT analysis', documentation audits, peer reviews, and whatever it is that you do .... The Physioboard's application guide document has even got reflection sheets in it, which you could use.
Bottom of the page: The Physiotherapy Board of New Zealand > Registration - Overseas Qualified Physiotherapists

You'll be fine. Don't get too uptight about it!!!
Good luck,
Fyzzio