Transactions — Castle S4

Card Present › Castle S4 › Transactions

Purchase, pre-authorisation, keyed entry, MOTO, refund, and void — all transaction types explained

Purchase

A standard sale transaction. Funds are authorised and captured in a single step.

1. 1From the TWPayz POS home screen, tap Purchase.
   Amount entry screen opens with numeric keypad.
2. 2Enter the transaction amount. Confirm the amount shown is correct.
   Amount is displayed clearly on screen.
3. 3Confirm the amount. The terminal prompts the customer to present their card.
   "Please present card" instruction appears on screen.
4. 4Customer taps (contactless) or inserts chip card. For chip, customer enters PIN when prompted.
   Terminal contacts card network. Response received in 1–5 seconds.
5. 5Wait for the result. Do not remove the card until the terminal instructs.
   Approved: green screen / Declined: decline reason displayed.
6. 6Select receipt option: Print, or No receipt.
   Receipt prints or transaction completes without receipt.

Pre-Authorisation

Reserve funds on a customer's card without immediately capturing them. The card is checked and funds are ring-fenced — no money moves until you complete a Final Capture. Used for hotels, car hire, event deposits, and other scenarios where the final amount may differ from the initial estimate.

1. 1Tap the menu icon (top-left of home screen). Select Pre-Authorisation.
   Pre-auth amount entry screen opens.
2. 2Enter the estimated amount to reserve. Confirm.
   Terminal prompts for card.
3. 3Customer presents card. PIN entered if required.
   Authorisation code displayed. Funds are now reserved on the customer's card.
4. 4Note the authorisation code or print a receipt — you will need this for Final Capture.
   Pre-auth transaction appears in Transaction History.

Final Capture

Complete a pre-authorisation and collect the funds.

1. 1Tap the menu icon. Navigate to Transaction History. Locate the original pre-auth transaction.
   Pre-auth record showing original amount and date.
2. 2Select the pre-auth record. Tap Capture.
   Capture amount entry screen opens, pre-filled with the original pre-auth amount.
3. 3To capture the full amount: confirm. To capture a partial amount (e.g. shorter stay, fewer items): clear the amount and enter the lower figure.
   Capture submitted. Funds settle to your account on next settlement run.

Incremental Authorisation

Add to an existing pre-authorisation without needing the customer's card again. Used when the final amount exceeds the original estimate (e.g. extended hotel stay, additional charges added to a tab).

1. 1Locate the original pre-auth in Transaction History. Tap Increment.
   Increment amount entry screen opens.
2. 2Enter the additional amount to add (not the new total — just the increment).
   New total reserved amount is displayed for confirmation.
3. 3Confirm. No card presentation required.
   Updated reservation amount shown. Final Capture can be performed for the new total.

Keyed Entry

Manually enter card details when the physical card cannot be read. This is a last resort — only use it when chip, contactless, and swipe have all failed.

1. 1From the home screen, tap Keyed Entry.
   Manual card entry form opens.
2. 2Enter amount, then the 16-digit card number (auto-formats with spaces), expiry date (MM/YY), CVV (3 or 4 digits), and cardholder name.
   All fields populated.
3. 3Tap Submit.
   Transaction processed. Result displayed within a few seconds.

MOTO (Mail Order / Telephone Order)

Accept card payments from customers who are not physically present — taken over the phone or via mail order. MOTO requires specific permission to be enabled on your account.

1. 1From the home screen, tap MOTO (visible if enabled on your account).
   MOTO entry form opens.
2. 2Enter: transaction amount, card number, expiry date, CVV, cardholder name. Optionally enter billing postcode for AVS (Address Verification — reduces chargeback risk).
   All fields populated.
3. 3Tap Submit.
   Transaction processed. Approved or declined result displayed.

Refund

Return funds to a customer for a previous transaction. The customer's card must be present for verification.

1. 1Tap the menu icon. Select Refund.
   Refund search screen opens.
2. 2Locate the original transaction by date, amount, or reference. Tap the record.
   Transaction details displayed.
3. 3Select Full Refund or enter a specific amount for a Partial Refund. Confirm.
   Terminal prompts for customer card.
4. 4Customer presents the original card used for the purchase. Card is verified.
   Refund authorised and submitted. Funds returned to customer's card within 3–5 working days.

Void

Cancel a transaction before it is settled — no funds will move. Void is only available within the same trading day (before end-of-day settlement runs). After settlement, use Refund instead.

1. 1Tap the menu icon. Go to Transaction History. Locate the transaction.
   Transaction record displayed with Void option available if not yet settled.
2. 2Tap Void. Confirm when prompted.
   Transaction voided. Status updated to Void. No funds move.