A method for sharing travel data to two sets of databases. In accordance with this invention, a Parent Customer leases vehicles to Child Customers. Travel data from the leased vehicles is directed through the Parent Customer's database first to a Gateway Server, then to a Middleware Server, then to the separate, corresponding Child Customer Databases. Child Customers, therefore, have full privacy, allowing them to see only data related to the vehicles they have rented or leased, and prohibiting future lessees from accessing data belonging to a prior lessee.