Then merchant calls card provider if they wanna follow up. And then CC provider would contact you to verify you tried to by the exhaust.
Unfortunately that's not how it works at all.
The Clearing houses like Visa and Mastercard could care less if you the merchant
get stuck. They make money on both ends of the transaction and take the funds back
if the transaction ends up fraudulent even though they authorized it as good at the
time of the purchase.
There is virtually NO WAY to verify the card holder has actually made the purchase.
I run a online commerce site and we have been stuck several times.
If you get a transaction that seems shaky but has been "Authorized" by Visa, etc,
which means all is good, number, 3 digit security code, billing address, etc. it can
still be a fraudulent transaction, maybe just not reported yet.
I've personally called our clearing house and have wanted to double check that the
card holder actually knows about the order and all they will tell you is that the
transaction has been approved so it's good.
They don't care! they are out nothing and still make there 3% they just take the money back.
Now the best you can do as a merchant which I have done several times to try my best to
verify is all cards first set of digits actually tell you the "banks name" that issued the
card (data bases are online to decipher) like Wells Fargo or Arizona First, etc.
Once you have the info you can try and call that bank and verify customer and card.
It's all a pain in the ass.
I've never asked for a DL copy and they are probably just seeing if you actually answer
any inquiries. Most scammers will not.
As a merchant you get ripped off a few times for some bucks and then find out
that Visa, MC, AMX, etc don't really care at all it really pisses you off (can you tell)
I would image certain types of business get pounded pretty good on fraud charges and there's
nothing they can do except try to verify with the actual customer.