Credential and/or location data included in data received by a networked system from a device that communicated the data to the networked system may be processed to determine if the credential data and/or location data validate an identity of a user (e.g., a guest, traveler, patron) and/or a location of the user based on a location of the device when the data is communicated. The data may be review data and the credential and/or location data may be included in review data. The device and/or the networked system may generate a location history database from location data from the device or other system that is periodically logged from multiple locations at different times during an event (e.g., a stay at a vacation rental). Data from the database may be used to determine if a location for a communication is with a threshold of an allowable distance from an allowable location.