[toliktm]

Carding with Discover cards have 3 options:
1. If you use them in an account they were used before they go smoth.
2. If you use them online at new merchants, usually they send email to confirm transaction if it was placed by the owner or not. (you have to click it was me, then resubmit the order for it)
3. If the site is vbv or msc, they send a code via text, phone call or email to put into the verification page.
Hope i helped you,