How Cybersource Payment Gateway works with Oracle Fusion AR payments including Transaction failures

Summary: We have successfully configured CyberSource payment gateway/Integration with Oracle Fusion. We still have doubt how Cybersource is going to handle negative cases/frauds while doing payments from Cloud.

Content (required): Example - Authorization is the first step which comes in picture adding a new Card/Doing payment from that card. Is that a correct Statement that - CyberSource will make sure that the authorization will come only if things are perfect like Expiry date/month/Credit Limit/Lost cases?

What if at a later stage, Fraud was detected or for any reason Payment can't be deducted from that card, how this thing will be handled in Fusion - In Authorization? In settlement or where? and how Fusion will know that Amount was not deducted or deducted?