Re: Fax vs Original Documents
It depends on what it is for, I suppose. A fax / scan of, e.g, a birth certificate can easily be doctored. The more official something is, then the more likely it is, I presume, that an original would be needed. Where it is just to convey something, e.g, a sample of your signature, than I see no difference in whether it should be a fax or original.
On saying that I have applied for a couple of jobs that require enhanced CRB checks and all of it has been done via email - not one piece of original documentation asked for (yet!).
I suppose it is one of those cases where reasonableness is shadowed by officialdom.