Banks offering credit cards have different security measures that you CAN use. For example, Capital One users can “turn on text or email alerts that will arrive when their balance goes above or below an amount that the customer sets, when a charge occurs above or below a certain amount, when any charge occurs at all, or if a transaction doesn’t go through because there isn’t enough money in the checking account.”
“Citibank can ping you if you’re within a set distance from your credit limit. Chase will text you if its systems detect an unusual charge and let you reject it on the spot.”
With Amex, you can receive an alert whenever someone gets a cash advance using the card .
Something that I think everyone should use is a “virtual” or “one-time use” card number. This feature is offered at least by Bank of America and Citibank. You ask or sign up for this one-time use number, and give it to just one online shopping site (iTunes, Lands End, whatever) – if it’s stolen, no problem – it cannot be used again! You can ask for as many of these as you need.