This info comes from a fairly reliable source on another board, but I'd really to know what the smart folks around here think about all of this.
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Ever got a charge on your credit card that you never asked for?
It happens to almost everyone sooner or later, and most of us have at least heard of most of the common reasons, but there are several newer wrinkles or sudden resurgences of old tricks that you may not know.
Cross-selling or how you unknowingly "opted in" to buy/subscribe when you left a site after a purchase
Force-posting or how charges can appear on a card you haven't even activated yet.
You can contest either of these with good success, if you notice, and know about the possibility. Otherwise they often try to convince you that it must have been your mistake somehow.
The only problem I have ever had shopping online (or via mail or telephone) was when we were planning our vacation in 2005. I used an online reservation system for a major motel chain and when the credit card bill rolled in we had a $9 charge for “WLI Reservation Rewards” (which is mentioned in the first blog article). I called the motel and asked what it was. They told me it was a fee for making the reservation online and that WLI handled the transaction, so they got the money. I nicely complained and told them that their web site never stated there was an online fee -- in fact it was the opposite: better rates for going online. I finally printed out the screen cap I'd taken of their web page with my reservation information and the motel chain gave me a refund, plus a discount on our room for "the inconvenience".

I've never had another charge from WLI, so I guess I'm lucky.
Two other things in the first blog article stuck out at me:
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Visa and Mastercard rules state that card data should not be stored, and the CVV, the verification codes are NEVER to be stored.
I don't understand this. We shop regularly at Amazon.com and they do store our credit card info. How can both be correct?
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Usually I make purchases on-line using my card and a bit of software called Shopsafe which produces one-time cards with a specified expiration date and a specified credit limit.
What is Shopsafe and is it really safe?
I haven't finished the second article so I really can't comment on it all.
We watch our credit card use very carefully and closely, and monitor our credit report on a monthly basis as well. Comes from having the state of ca's computers hacked and then having calpers "share" our social security number with the postal system and world.

Anyhow, what do you financial wizards think of all this stuff?