A server computing device configured to receive, via an anonymization network and from a first mobile computing device that determines a location from a set of locations of the first mobile computing device is within a threshold distance of an event, a proximity indication that a first user associated with the first mobile computing device is proximate to the event; in response to receiving an indication of a remittance for the event from a second user, generate an association between the remittance and the event; in response to receiving descriptive data that is descriptive of the event, send the descriptive data to a second mobile computing device of the second user; and in response to receiving an indication to release the remittance, send a message that executes a transaction that transfers at least a portion of the amount of the remittance to an account associated with the first user.