I had been considering signing up fro Netflix Movie service. I went to their website and found they offered a free trial but they required a credit card as you would be charged after the first 30 day trial should you not cancel.
Well, imagine my shock when I found they hit my credit card not once, not twice but THREE TIMES!!! Charges totaled around $26.
I called Netflix and was told that a person at my APARTMENT address has already had a free trial some time ago so they automatically charged ME for a retro month back then, plus they automatically charged me for the current month plus a fee to see if the credit card was valid.
Do not give these unethical people your credit card number !!! Save yourself the grief of trying to get your money back. Just don't give them your credit card number! A company that acts in this sort of unethical manner cannot be trusted.