Overview
This guide explains how to configure and use the Adyen S1F2 payment terminal in standalone mode, meaning without a connection to a point-of-sale (POS) system. All transactions are initiated directly from the terminal screen.
What this guide covers
Setup: charging the terminal and loading the paper roll
Sales: processing a contactless, chip, or magnetic stripe payment
Refunds: two methods depending on whether the original transaction is available or not
Cancellations: why they are not available on this terminal and what to do instead
Receipt reprinting and common troubleshooting
How to use the terminal
Getting to know your terminal
The Adyen S1F2 is an all-in-one portable payment terminal with a built-in printer. It supports contactless (tap), chip, and magnetic stripe payments.
Feature | Details |
Screen | 5.75" color touchscreen |
Printer | Built-in thermal printer |
Receipt paper | 57–58 mm wide thermal paper roll (max. 40 mm diameter) |
Connectivity | Wi-Fi + 4G LTE (pre-installed eSIM) |
Charging | USB-C cable (included) |
Weight | Approximately 495 g |
Operating system | Android 9 |
Important: Your terminal does not require an end-of-day close or batch settlement. Adyen handles settlement automatically every business day — there is nothing to do at the end of the day.
Setting up the terminal
Fully charge the terminal using the included USB-C cable before first use. Allow at least 4 hours for a full charge.
Locate the paper compartment cover on the back of the terminal.
Lift or slide open the compartment cover.
Place the paper roll so that it unrolls from the bottom.
Guide the free end of the paper up toward the top of the terminal, toward the screen.
Close the cover firmly until it clicks into place, then tear off the excess paper.
Note: Use only 57–58 mm wide thermal paper. Regular paper will not print.
Processing a sale
On the home screen, tap Payment.
Enter the transaction amount using the on-screen keypad.
Tap Confirm.
Hand the terminal to the customer, who presents their card in one of the following ways:
Contactless / NFC: tap the card, phone, or smartwatch on the screen
Chip: insert the card into the reader at the bottom
Magnetic stripe: swipe the card through the side reader
The customer follows the on-screen instructions, such as entering their PIN.
A green screen means the transaction is approved. A red screen means it was declined — ask the customer to try another card.
The terminal automatically prints a receipt.
Processing a refund
There are two ways to proceed. Use the referenced refund whenever possible.
Option A — Referenced refund (recommended)
Use when the original transaction was processed on this terminal.
Tap Transactions on the home screen.
Locate and select the original transaction.
Select Refund.
Confirm the refund amount — adjust only for a partial refund.
Tap Confirm. A refund receipt will print.
Option B — Unreferenced refund
Use only if the original transaction does not appear in the terminal's history.
Tap Transactions, then New Transaction.
When a PIN is requested, enter 5773.
Select Refund.
Enter the refund amount and tap Confirm.
Hand the terminal to the customer so they can present their original card.
A refund receipt will print once the transaction is approved.
Note: Refunds do not generate a traditional authorization code — this is standard practice in the payment industry. Use the PSP reference number printed on the receipt as the official transaction identifier.
Cancelling a transaction
Cancellations (voids) are not available on the Adyen S1F2 in standalone mode. Adyen is configured with immediate capture: as soon as a transaction is authorized, it is captured and submitted for settlement within seconds, leaving no window for a cancellation.
If a transaction was processed in error or a customer needs to be refunded, process a refund instead.
Situation | What to do |
Transaction processed in error | Process a refund |
Customer changes their mind immediately after paying | Process a refund |
Incorrect amount charged | Refund the original amount, then initiate a new sale for the correct amount |
A refund returns funds to the customer's card after the transaction is captured and typically appears on their statement within 3–5 business days, depending on their bank.
Reprinting a receipt
Tap Admin on the home screen.
Select Transactions, then History.
Locate and select the desired transaction.
Select Receipts.
Choose Customer Receipt or Merchant Receipt.
Tap Print.
Settlement
Adyen automatically groups and settles all transactions every business day — no batch close is required.
All transactions are captured automatically throughout the day
Funds are deposited Monday through Friday (weekend transactions roll over to the next business day)
Settlement reports are available through the ValPay partner dashboard
Tip: Simply ensure the terminal is charged and connected to Wi-Fi or 4G each day.
Troubleshooting
Issue | Solution |
Terminal won't turn on | Charge via USB-C for 30+ minutes, then hold the power button for 5 seconds |
Receipt won't print | Check that the paper unrolls from the bottom and that the cover is fully closed |
Receipt prints blank | Use thermal paper — regular paper will not print |
Card not reading | Try in order: contactless, chip, magnetic stripe. Clean the reader if debris is visible |
Transaction declined | Ask the customer to try another card. Do not retry the same card multiple times in quick succession |
"No connection" message | Check Wi-Fi. The terminal automatically switches to 4G if Wi-Fi is unavailable |
Transaction history not found | Go to Admin > Transactions > History. Search by date and amount is available |
Terminal freezes | Hold the power button for 10 seconds to restart. All data is stored in Adyen's cloud |
FAQ
Can I cancel a transaction on my terminal?
No. The Adyen S1F2 uses immediate capture, so cancellations are not possible. Process a refund instead.
Do I need to do an end-of-day close or batch settlement?
No, Adyen handles this automatically every business day. Just ensure the terminal stays charged and connected.
What type of paper should I use?
A 57–58 mm wide thermal paper roll. Regular paper will not print.
What if the wrong amount was charged?
Refund the original amount, then initiate a new sale with the correct amount.
Need additional help?
Contact your ValPay partner representative with the following information on hand:
Terminal serial number (sticker on the back of the terminal)
Merchant trade name (DBA)
Description of the issue and when it started
PSP reference, if the issue relates to a specific transaction