Summary: When Qashier POS loses its internet connection you can usually keep ringing up sales, but some actions wait until you are back online. This article explains what still works, what needs the internet, what "Offline Transaction" in Reports really means, and why customer lookups stop at outlets in a brand group.

Applies to: All markets · Qashier POS on any device · no special access needed.

Before you start

Check the connection first. On the POS home screen, tap the menu icon (☰) at the top right, then Wifi, and reconnect. If you use a Qashier router, see [SG] How to Set Up the TP-Link Archer C20 (AC750) Router: Router or Range Extender Mode or [SG] 4G Router Connected but No Internet? Set the APN on Your TP-Link 4G Router.
Do not clear the cache or log out while the POS is offline. Sales that have not been uploaded yet are kept on the terminal until it reconnects.

What still works while offline

Taking sales paid in cash or by other manual payment methods. Qashier POS saves each sale on the terminal and uploads it when the connection comes back. The sale appears in QashierHQ only after that.
Customer lookups at a single outlet. If your store is not part of a brand group, the POS can still show customers from the data already on the terminal.

If your store has ticked Restrict POS action during offline (QashierHQ > Settings > Additional Settings > Table Management), the POS does not let you tap Pay or Next, void table items or change tables while offline, and shows "Error, Please check your Internet connection and try again". In other words, no sales can be taken offline. Stores that share tables across several tablets use this to keep the tables in step.

What needs the internet

Action	What you see offline
Card or QR payment sent to a separate QashierPay card terminal	"No Internet Connection" – "Please connect to the internet to continue", with Wifi Setting and Retry
Voiding a sale in Transaction Record	Void Fail – "Fail to void transaction"
Adjust Tip, or Sales Completion for pre-authorised card sales, in Transaction Record	"No Internet, please try again"
Reports	"There was an error with the Internet connection. Please connect to the Internet to view reports"
Cash Management reports	"There was an error with the Internet connection. Please connect to the Internet to view cash reports"
Customer lookups, points, credit and packages at a brand-group outlet	Connection required (see below)

Voiding a sale you made while offline

Reconnect the terminal to the internet.
Wait a moment so the sales saved on the terminal can upload.
Open Transaction Record, find the sale and void it as usual. See How to Void or Refund a Transaction in Qashier POS.

"Offline Transaction" in Reports is not about the internet

In Reports, the filter icon at the top (Offline/Online Transaction) lets you choose which sales to show: All, Offline Transaction, QashierEats, GrabFood or FoodPanda. Offline Transaction means sales made in-store on the POS, as opposed to online orders. It does not list the sales you made while the terminal had no internet. Reports themselves need a connection.

Why customer lookups stop at brand-group outlets

Some businesses run several outlets as a brand group: all outlets share one customer list and the same loyalty points, credit and packages, held centrally for the brand. An offline terminal cannot check the latest balance. If it used an out-of-date balance, a customer could spend the same points or credit twice at two outlets. So while a brand-group outlet is offline:

Searching, adding, editing or opening a customer, their transaction history, package records and redemptions shows Connection required: "Brand group features require an internet connection. Please reconnect to continue." Tap Retry once you are back online, or Cancel to carry on without the customer. If you are still offline, the message changes to "Still offline — please check your WiFi."
If a customer's details are already open when the connection drops, the screen shows "Offline — customer view only. Reconnect to apply changes." and the buttons that change the customer are disabled.
If the customer was attached to the bill before the connection dropped, you can still take the payment. If their points, credit or package cannot be updated, the POS shows "The sale was completed, but the customer's loyalty points / credit / package could not be updated. Please check the customer's balance and adjust manually if needed."

What you should see

After you reconnect, the sales you took offline appear in Transaction Record and QashierHQ, and Reports open normally.
At a brand-group outlet, Retry on Connection required takes you straight back to the screen you wanted.

If something goes wrong

Symptom	Cause	Fix
Sales made offline are missing in QashierHQ	The terminal has not reconnected yet	Reconnect the terminal and keep Qashier POS open for a few minutes. Do not clear the cache or log out first.
"Fail to void transaction"	The terminal is offline	Reconnect, then void again.
"Error, Please check your Internet connection and try again" when you tap Pay or Next, or void a table item	Restrict POS action during offline is ticked and the terminal is offline	Reconnect. See How to Void an Item or a Whole Table in Table Management (Qashier POS).
Connection required keeps showing	The brand-group outlet is still offline	Tap Cancel and finish the sale without the customer, then reconnect.
A customer's points or credit look wrong after an offline sale	The loyalty update did not go through	Adjust the balance: How to Adjust a Customer's Loyalty Points in QashierHQ.

If the problem continues, see Contact Qashier Support by Phone, WhatsApp, LINE or Viber (SG, MY, TH, PH).

Last verified: 25 Sep 2026 · Markets: All markets

Qashier POS Is Offline: What Still Works and What to Do