These scammers are becoming more and more sophisticated. I thought I'd never get gulled into coughing up password details, that is until an extremely authentic looking BT/Yahoo mail came my way recently and said I had to upgrade and login to their new, free service, which I duly did. Phished I was. Well and truly.
Also had a cheque for nearly £2,000 intercepted en route which ended up being paid into some West African-sounding account. That's called cheque conversion fraud. Fortunately Natwest investigated quickly, confirmed the payee details had been expertly changed by forgery and repaid the monies without ado. And, not long before that, someone up in Scotland (I live in Dorset!) managed to con a mobile 'phone and airtime from Orange simply using my name and address details. Found that one out when Orange started sending threatening letters. I said 'how can you possibly give a 'phone away up in Perth on the strength of my name and address alone?'. I never got an answer to that one.
Stay vigilant. It's not just the government constantly after your money.