I&#x27;m really surprised theft is not an issue.  Maybe the town is small enough that everyone is recognizable.<p>&gt; All they need to do is to register for the service and download an app. They get charged for their purchases in a monthly invoice.<p>I wonder if he&#x27;s aggregating to pay the fixed part of credit card fee just once a month per person.  In that case, this is a great idea.<p>&gt; Ilijason is considering other ways to unlock the door that wouldn&#x27;t require using an app. He&#x27;s ruled out face-recognition or fingerprint scanners, but is thinking of installing a credit card reader like some banks use.<p>Some banks use credit card scanners to let you in the door... what?