Have you ever wondered what goes on whenever you make a transaction with your credit card? Do you actually know what happens whenever the merchant swipes your card into their point of sales (POS) system?

First, you hand your items to the cashier for him to compute the total amount of the items you purchased. The cashier then requests for your credit card. Your credit card is swiped on the POS system and the amount is registered into the device.

The POS system then sends an authorization request to your credit card company to validate the transaction. Although the total amount of your transaction has been sent, the credit is not yet deducted from your account at this moment. When the transaction is permitted, the credit is still not recorded. The amount of the purchase is simply reserved. A reply is sent to the POS system at the store informing if the transaction is valid or not.

If your transaction is approved, the POS system prints out a receipt for you. The cashier will give the receipt for you to sign, as this would be their means to reimburse the transaction from the bank. During closing time, or whenever the store makes inventory and match the daily transactions, a person at the store would be assigned to match all the recorded transactions in the POS system with the receipts that they have.

If everything turns out well, the store would then send a request to the bank for reimbursements for the transactions. The bank then sends a request to the credit card companies for each of the transactions that the store made. The credit card company would give the amount due to the bank but deduct an inter charge fee for each transactions. The amount collected by the bank is then deposited to the stores account less a discount fee for the services rendered.