It really depends on your merchant agreement. I was an asst controller for a hotel and I have looked as so many different processing banks and levels of protection.
If a card fails an algorithm test, you can call it in and get an manual OK. I had a Chase card that gave me trouble as it had my address as
Markxxx
APT B
123 Fake Street
Chicago
The algorithm in some places was failing as it was comparing the street address to apt B.
Here’s something most people don’t know. You can put anything in the approval code. If I run a credit card through a machine and it’s declined, I can simply over ride it manually and put anything. AND the charge would go through. HOWEVER, if the credit card holder later disputed that charge, the store would lose because it put a fake approval in.
But if the credit card holder never disputes it, it doesn’t matter. The only time it would come to light is in the event of a dispute.
You pay for levels of protection and that is all you get from your processing bank. For instance, I was the asst controller of a hotel. History showed in the last 5 years we got THREE chargebacks. That is insanely low. So we went with the lowest level of protection which is MUCH cheaper.
But when our reservationist would make a reservation she’d ask for the three digit code on the back of the credit card. But this was totally unnecessarily. You know why, 'causes we didn’t pay for that protection. If a dispute happened and the hotel pointed out the person must have had the card as they had given us the correct 3 digit code on the back, the bank would say… “You don’t pay for that high level of protection, so you don’t get to use that as evidence to argue your case. You lose.”
In the event of power failures or downtime merchant agreements also cover that. For instance, in our hotel we were covered for 72 hours with notification for a limit.
In other words, if the power at the hotel went off or for some other reason we couldn’t verify the credit cards via the machine, we would call our bank processor and tell them. Then they would give us a “clear.” In our case it was $300 for three days.
That means anyone who checked in AFTER we phoned to notify them of our inability to electronically process, we could just take the imprint of the card and we were covered UP TO $300. If the charges went higher than we’d have to phone it in and get a higher limit, but as long as it stayed under $300, the bank covered a bad credit card we couldn’t check.
If you read these merchant agreements they are huge and full of restrictions and if merchants followed them to the letter, half the sales wouldn’t be possible. So they just go ahead and figure as long as the buyer doesn’t dispute them they’ll be OK.