I just got an e-mail that said:

Dear Sir/Madam,

We were informed that your card is used by another person or stolen. It could happen if you have been shopping on-line, and someone got your "Billing information" including your card number. To avoid and prevent any billing mistakes and to refund your credit card, it is strongly recommended to proceed filling in the secure form on our site and applying for our Zero Liability program. This program is free and it will help us to investigate this accident.

Sincerely yours, Visa Support Assistant, Alwin Desagun.

And then there was a button that I could press that said "Continue", I almost fell for it.