By the end of this topic you will be able to:
- Process a card payment correctly using a point-of-sale (POS) terminal.
- Distinguish between chip-and-PIN, swipe and contactless payment methods.
- Handle declined transactions professionally and without embarrassing the customer.
- Follow the correct procedure for void and refund transactions.
What Is a POS Terminal?
A Point of Sale (POS) terminal is the electronic device used to process card payments. At a petrol station, POS terminals are typically located at the cashier desk inside the forecourt shop, and sometimes on portable handsets used by attendants at the pumps.
Types of Card Payments
| Method | How It Works | When Used |
|---|---|---|
| Chip and PIN | Customer inserts card into chip reader; enters 4-digit PIN | Most common method for all amounts |
| Contactless / Tap | Customer taps card or phone on the terminal’s contactless reader | Small amounts (typically under R500) |
| Swipe | Card is swiped through the magnetic strip reader; customer signs slip | Only if chip is damaged or terminal chip reader is faulty |
| Mobile wallet (Apple Pay, Samsung Pay) | Customer taps phone or smartwatch; transaction approved via biometric on device | Where supported by the terminal |
Processing a Card Payment — Step by Step
- Enter the correct transaction amount on the POS terminal — double-check before proceeding.
- Select the transaction type: Purchase (not refund or void).
- Hand the terminal to the customer (or bring the mobile terminal to them at the pump).
- Customer selects their payment method: Credit, Cheque or Savings account.
- Customer inserts card and enters their PIN (or taps for contactless).
- Wait for the terminal to show “Approved” — do not release fuel or goods until approval is confirmed.
- Print the receipt — hand one copy to the customer; retain one copy for station records.
- Ask: “Would you like a printed receipt?” — not all customers do.
- Never enter an amount higher than the transaction total — this is fraud.
- Never allow customers to show you their PIN — you should never know their PIN.
- Never process a card payment if the customer is not present and watching.
- Never retain a customer’s card — hand it back immediately after the transaction.
Handling Declined Transactions
A card can be declined for many reasons: insufficient funds, daily limit reached, card blocked, incorrect PIN entered too many times. Handle declines with discretion:
- Inform the customer quietly and privately: “I’m sorry, the card has been declined.”
- Do not announce the decline loudly or in front of other customers.
- Offer alternatives: “Would you like to try another card, or would you prefer to pay cash?”
- If the customer believes it is a terminal error, try processing once more — but if it declines again, the customer should contact their bank.
Void and Refund Transactions
| Transaction Type | When to Use | Who Authorises |
|---|---|---|
| Void | To cancel a transaction on the same day before batch settlement | Supervisor / manager |
| Refund | To return money to a card after the transaction has settled (next day+) | Manager only — never processed by an attendant without approval |
Always call your supervisor for void or refund transactions — do not attempt these on your own.
Key Terms
| Term | Definition |
|---|---|
| POS Terminal | Point-of-Sale terminal — the electronic device used to process card payments. |
| Contactless | A payment method where the card or device is held near the terminal without inserting or swiping. |
| Void | Cancellation of a transaction on the same day it was processed. |
| Batch settlement | The end-of-day process where all the day’s card transactions are sent for final processing by the bank. |
- What is the difference between a void and a refund transaction?
- How should you handle a declined card without embarrassing the customer?
- Why should you never know a customer’s PIN?
📚 Additional Resources
📖 Further Reading
🎬 Watch: Point of Sale & Card Payment Processing Tutorial
A practical walkthrough of processing card payments through a POS system, including chip, tap and swipe transactions.

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