Depends on what part of the chain you are. Most gateways/processors offer some sort of token that the end user uses. You then put your trust in the gateway/pro

Depends on what part of the chain you are. Most gateways/processors offer some sort of token that the end user uses. You then put your trust in the gateway/processor to store the credit card. Which I assume is most likely behind the best possible security stuff money can afford. Since that's their entire business. One screw up and their gone.