During a power outage, many parts of the digital payment ecosystem can fail, including POS terminals, Wi-Fi routers, mobile payment systems, and ATMs.
Cash remains the most reliable form of payment during a power outage, as it doesn't rely on electricity, networks, or authorization servers.
Some businesses enable offline card transactions for limited amounts, storing payment data temporarily.
Mobile payments like Apple Pay or Google Pay may still work during a power outage if the retailer's terminal is operational and only the internet is down.