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> You can't just go to an ATM and start working through 50 credit cards you stole until one worked without something noticing. Why not? ATMs work at 3AM. > bu
by ryanlol 6y ago
> You can't just go to an ATM and start working through 50 credit cards you stole until one worked without something noticing.
Why not? ATMs work at 3AM.
> but you also have to test what credit cards work and what don't
Not really, if it’s data you skimmed yourself odds are they’ll work more than half the time.
- michaelt 6y ago> Why not? ATMs work at 3AM. If I was in fraud detection there would be fraud flag contagion: If 25% of them started out as blocked and you tested them all, afterwards 100% would be blocked.
- pc86 6y agoHow do you know who the "you" is? It's not like somebody's sitting there watching the CCTV footage. I can think of ways around it myself but I don't think they're realistic for the number of times this would actually happen.
- michaelt 6y agoI'm no expert in these things, but I'd imagine there would be a soft flag for possible fraud, that triggers something like text messages to customers confirming their purchases. If within X minutes you see Y cards and Z of them are known to be stolen, you set the soft fraud flag on all of them. Values of X, Y and Z would be set based on historical data. You could still test your stolen cards, of course - but 5 at a time, not 50 at a time.
- ryanlol 6y agoThis would require significant collaboration between banks, seems unlikely.
- blaser-waffle 6y agoWear a hood/mask/glasses. Hit ATM at 3am. Park behind the building or a block away. Test 25% of the cards. Then repeat for each block of 25%.