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How Retail Credit Card Processing Works
The model
below describes how retail credit card processing works in a
typical storefront environment.

1.
The merchant slides the customer's card through the
credit card terminal and enters the sale amount. The
terminal then connects to Merchant Warehouse’s processor for
authorization.
2.
The processor passes that information onto the bank
that issued the credit card where the bank checks to see if
the card is valid and see if the charge amount is available
on the card.
3.
The issuing bank sends back an approval number or a
decline message to Merchant Warehouse’s processor.
4.
The information is passed back to the credit card
terminal which prints a receipt for the customer to sign if
the card is approved. It takes approximately 12-15 seconds
to complete steps 1-4 on a credit card machine using a phone
line. The newer internet enabled machines can cut this time
to just a few seconds.
5.
At the end of the day the merchant must "settle" or
"batch out" their terminal which will begin the final
process of the transaction. In most cases Merchant Warehouse
can automatically settle the transactions at a specified
time each day. Once the settlement process is initiated the
funds are transferred from the card issuing bank and are
electronically deposits them into the merchant's checking
account. It typically takes no more than two business days
from the time of the original transaction for the funds to
reach the merchant's checking account.
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