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Why is it stupid for Amazon to show the last 4 digits? Let's say I have 3 cards on file. If I want to modify card #2 for some reason (billing address, expiry da

by sigkill 14y ago

Why is it stupid for Amazon to show the last 4 digits? Let's say I have 3 cards on file. If I want to modify card #2 for some reason (billing address, expiry date) what do I do? Sure, I can look at the other details and take a guess, but we're on HN. On an average, the normal customer would get frustrated.

abraham 14y ago
> Why is it stupid for Amazon to show the last 4 digits? I think npsimons was saying that it is stupid for Amazon to let you add a fake cc number and than take over an account using that same fake number. Not that they show the last 4 digits.
- sigkill 14y ago
  Ah well, then I stand corrected. So, now the question becomes, should you be allowed to add credit cards over the phone? Or does it become, how long should Amazon wait until they accept the new credit card as a valid ID? For the second question, I'd say Amazon should wait until the user "confirms" the credit card. That is to say, send the user an email stating "Hi! New credit card added to your account. Click here to verify".
  - abraham 14y ago
    They could do pre-authorizations on the card to make sure they are valid and match an address on file.
    - sigkill 14y ago
      That's a good point. But wouldn't prepaid cards defeat this? I'm not an American so I don't know how the address verification on prepaid cards work.