by 1 00 00 in accordance with the example of a transfer history shown in fig1 fig1 illustrates how the transfer of an electronic representation of currency produces a tree like structure of electronic representations of currency derived from the initial note produced by a money generator module as individual transfers part of a tree branch of the note are deposited or return to the banking system according to note updating the note transfer tree in fig1 is built by the money issued reconciliation system in this example money generator 1 module identifiers are contained in digitally signed certificates produces an electronic representation of currency 2300 having a body group of data fields and a transfer group of data fields which are shown schematically in part for purposes of clarity of exposition in addition the signatures and certificates group of data fields is not shown for convenience the body group of data fields includes a note identifier e g 34 n12 34 a money generator module identifier e g 34 mg1 34 an issuing bank identifier e g 34 bank name 34 a date of issue e g 1 00 00 a date of expiration e g 12 00 00 a note amount and a monetary unit identifier e g 50 other body group data fields such as type of note are.