If your card is stolen you should, but not necessarily if you fall for a Facebook ad that ships you a pile of rocks or a paper photo of the product you thought you bought.
Isn't that exactly when you should have your card number changed? You gave your card info to a blatant fraudster. If they're willing to ship you a pile of rocks then there's a significant chance they're willing to use the card info you gave them to make fraudulent purchases.
Isn't that exactly when you should have your card number changed? You gave your card info to a blatant fraudster. If they're willing to ship you a pile of rocks then there's a significant chance they're willing to use the card info you gave them to make fraudulent purchases.