There are a couple of issues around that, Chair, that I won't get into in any great detail, but my understanding, having talked to people who work within our public service and people who work in banking, is that this is done on a regular basis in verification of data: being able to simply verify, because the information is held by, in many cases, banks and governments.
When we change residences or change businesses, etc., that change and verification is not hard to do, because there are many ways of verifying, through the data that is kept by government or kept by a bank to establish that the person on the other end of the line is, if you will, that person. So it's a matter of already having access. That would be vis-à-vis telephone.
Vis-à-vis e-mail, again that's verification starting with an e-mail being sent in, a verification by phone or by other media, mailing someone a hard copy to verify that it in fact is the case, and having them sign off. It's simply to bring people into the process. There are many ways of doing it. It's done on a daily basis in banking and in government.