Issue of duplicate pan card

hi i have lost some time ago my pan card which is issued by deptt 8 yrs back. so deptt letter issued along with pan is not available. this pan i have used in some places like on bank, LIC etc. i have applied recently a new pan card and that new one is received by me recently. a letter is also issued along with this new pan card mentioned here allotting more than once pan card liable to penalty or punishment or both. so i am worried after knowing this what i can do now. i have a duplicate(Xerox) copy of old pan card along with FIR copy filled on that time. pls suggest.