Every now and again we have to update all our accounts which are paid by credit card (which is almost all of them). For some reason only Sky and WxC require a form to be posted to them (according to their web site, which may be outdated?), everyone else is happy to accept customers to change it themselves on-line. AFAIK it is (or maybe used to be) actually required to get a signature on paper, but just wondering if WxC wants to comment/confirm or maybe consider changing?
Even if you can phone in with the details, I'd much rather prefer to just log into my account and change it myself. Much easier than getting people to decipher my strong Afrikaans accent ;-). I'd even fax it, not that I own one.
(Also note that when printing the authority form at 1:1 the blocks are far too small for writing numbers in.)