Patent attributes
In some examples, a system may receive, from a merchant device, an indication of a transaction between a merchant and a customer, including transaction information associated with the transaction. The system may further receive, from the merchant device, a signal from a customer device associated with the customer and received by the merchant device. Based on the transaction information, the system may determine a previous signal previously received from the customer device, and at least one previous parameter associated with the previous signal. The system determines at least one parameter associated with the received signal and determines a presence indication based on comparing the previous parameter and the determined parameter. For example, the presence indication may be indicative of the customer device being physically present at or near a geographical location of the merchant device. Based on the presence indication, the system may send an instruction to process the transaction.