I'll be darned - they really do check purchases
I bought something on E-Bay for a gift and used paypal but had it the gift sent to the person's home. Well lo and behold Citibank sent me a real e-mail (they told me to call them using the phone number on back of my card) I did and they said there was suspicious activity in the amount of $10 and I knew what they were talking about. They also said there was a $20 gas purchase made later (hubby did that one). I've seen those commercials but never believed they would really notice purchases like that. Three cheers!