Will checkout work during an internet outage? Run this drill

A backup hotspot in a drawer is an untested plan. Before a busy weekend, a shop or service business should know which checkout functions still work when its normal internet connection fails, which need a different connection, and who is allowed to make that switch.

This is a controlled rehearsal, scheduled outside customer service hours with the person responsible for the network and the payment provider’s instructions in hand. Do not interrupt an active payment or disconnect equipment that supports alarms, medical devices or other safety functions.

Name the failure you are testing

Separate an internet outage from a power outage and a payment-provider disruption. A cellular connection can help when the normal internet service fails, but it cannot power a dead terminal. It also cannot make a provider’s unavailable service work.

Southern California Edison’s business preparedness guidance recommends defining employee responsibilities in a continuity plan and identifying equipment that needs attention during an outage. For this drill, write down the narrow scenario: normal internet unavailable, building power available, and no known payment-provider incident.

Keep a separate power-outage procedure. The internet test does not validate battery runtime, building access or whether it is safe to remain open.

Prepare a checkout dependency sheet

List the actual equipment and services needed to finish a sale. Include the terminal, card reader, router, local printer, inventory connection and any appointment or order system. Record the support number and account identifier for each vendor without putting passwords on the sheet.

Then answer these questions with your payment provider:

• Does this exact device and account support offline payments, and must that feature be enabled in advance?
• Which payment methods and checkout functions remain available?
• What transaction limits, deadlines and financial risks apply?
• How do staff recognize pending, completed and declined payments?
• Which recovery actions could erase pending transactions?

For example, Square’s US offline-payment instructions distinguish supported hardware and describe uploading payments after reconnection. They warn against signing out, deleting the app, switching modes or locations, or factory-resetting hardware while offline payments are pending. Record the current instructions for your own setup; another processor or device can behave differently.

Run the rehearsal without customer card data

Have the network provider supervise a reversible simulation of the internet failure. First record normal operation. Then test whether the approved backup connection becomes available, whether staff can identify it and whether the payment equipment can reach the services it needs.

Use the processor’s supported diagnostic or test procedure. Do not improvise a live charge, photograph cards or write down card details. If the provider has no suitable test method, ask it to supervise verification and document what could not be tested.

Check more than the terminal screen. Can staff find the appointment, send the order to the right printer and produce the supported receipt? Keep guest devices off the payment network, and confirm any connection change with the POS vendor before making it. The restaurant IT guide covers the broader network design.

Record a result for each step

Use a simple drill log: task, expected result, observed result, person responsible and next action. A useful entry might read: “Backup connection established; receipt printer unavailable; network provider to check printer reachability.” That is a hypothetical example, not a claim that your printer should work in every offline configuration.

Mark tasks as passed, failed or untested. Measure how long the switch takes during your own drill. Do not substitute a router’s advertised failover time for the time staff need to recognize a problem and resume service.

Finish with recovery and a staff instruction card

Restore the normal connection using the agreed procedure. Confirm that systems reconnect and that any provider-supervised test transactions have the expected final status. If a real outage leaves pending payments, follow the provider’s recovery process before resetting equipment or attempting a second charge.

Leave staff a short instruction card: how to recognize this outage, who to call, which approved steps they may take, when to stop accepting affected payments and who confirms recovery. Review it after a provider, device or network change. Coastal Growth Co.’s one-time IT support can help assess the network and document the questions that need answers from your payment vendor.