It makes you think though - on my certificate, as far as I know, the only difference between an authenticated (£20) and non-authenticated (cost of a photocopy) copy is that the authenticated one has a sticker on it, signed by a registrar. If someone is keen enough to bother forging a degree certificate, I'm sure they'd have no problem forging a "sticker of authentication". I wonder if it's a mutual, unspoken, agreement between universities to ask for certified copies all the time, so that they can rake in these ridiculous amounts of money.