The Central Bank's Department of Issuing and the Bank of Taiwan may retain a sample of each newly discovered type of counterfeit (altered) or imitation notes and coins to meet the requirements in their operations, and make out a file card for future reference (see Appendix 3 for the card format). The rest of the counterfeit notes and coins shall be kept by the Central Bank's Department of Issuing for a period of five years, and shall then be destroyed thereafter . A table verifying destruction of the notes and coins shall also be maintained (see Appendix 4 for the format).