I've never been asked for the security code of my card in any online transaction. Now, for a Facebook ad, Facebook wants me to enter it. Is this normal?
The 3 little numbers on the back of the card? Yes, this is normal.
"I've never been asked for the security code of my card in any online transaction."?
Socrate, I think you're confusing your PIN code with the CVV number (also known as the security code).
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