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Pay online: credit card or debit card?
Credit card, without a doubt. The reason is dispute resolution. If you dispute a charge on debit card - the money has left your account already, and if the dispute was accepted - you'll get it back. If. Eventually. In the mean time your overdraft will be missing $$$. For credit cards, you can catch a fraud action before the money actually leaves your pocket and dispute it then. In this case the charge is set aside, and you will only be required to actually pay if the dispute is rejected. I.e.: The money stays in your pocket, until the business proves that the charge is legit. In both cases, if the dispute is justified (i.e.: there was indeed a fraud) neither you nor the bank will lose money at the bottom line, it's just who's got the money during the dispute resolution process (which may be lengthy) that matters.