[ahonhn]

Credit card terms vary from country to country.

Here (Singapore) card conditions were recently changed so that you would only be liable for the first $100 of fraudulent transactions (assuming you can prove it wasn't you). I think the bank can still hold you liable for more if they find you were negligent about guarding your card details.

Prior to these condition changes, I remember being told by the bank that you would be liable for all charges incurred before you had reported the card physically stolen or lost.