These White Sales BK Papers with interleaving carbon have been designed to keep track of account information. These two part booked guest checks offer thirteen conveniently spaced lines for error-free recording, and have a duplicate copy of the data for your own records.They can also be used to keep complete track of a customers particular account information such as: account balance, day account was opened, details of transactions, etc. For more information on our selection of quality guest checks, be sure to check out our Guest Checks and Order Pads Buying Guide.