Separate the device, local network, internet provider, and register and payment system service. Write down the exact error and time. A clear incident record beats reboot roulette.

• Errors across every device versus one terminal.
• Power, cable, heat, storage, or battery symptoms.
• Offline payments not configured or understood.
• Updates delayed because nobody knows the account or maintenance window.

• Photograph the error and record time, device, and transaction state without customer data.
• Check power, connections, network, and provider status.
• Review the register and payment system maker’s offline and recovery instructions.
• Train staff on the approved cash, offline, and escalation path.

NYC shops can call us to check the local setup and write down what to do if it fails. Payment risk and offline limits come from the register and payment system provider, so follow its current official guidance.

Get a plain-English second opinion

Product features and rules can change. Use the linked source as the current word.

• Square: Process offline payments — Official preparation, limits, and risk guidance.
• Square: Troubleshoot your network connection — Official checks for device, router, internet, and Square service connectivity.