Because Clipper operates in multiple geographical areas with sporadic or non-existent internet access, the fare collection and verification technology needs to operate without any networking. To accomplish this, the Clipper card memory keeps track of balance on the card, fares paid, and trip history. Unfortunately, this also means if funds are added to the Clipper account via the internet, funds will not show up on the clipper card until it has been scanned at an internet-enabled (or recently synchronized) device. Buses and other vehicles without internet access will have to return to a service station in order to synchronize with Clipper's servers. During synchronization, the payment collection device will upload to the server data about any fares collected, and will download information about new account balances. Riders who scan their card at a recently synchronized payment collection device will have their card updated to reflect their true account balance.