Some foreign publications mention that there were rubber stamp "BANGLA DESH" overprints on different denominations of Pakistani bank notes during the a.m. period. It may be mentioned that Pakistani postage stamps were rubber-stamped and used all over Bangladesh until 30 March 1973, but Bangladesh Bank or the Ministry of Finance never issued an order to overprint or rubber-stamp Pakistani currency. It would be interesting to note here, that a counterfeiting gang is active, which uses a "washing system", whereby ৳100 notes are washed with a special kind of liquid, and the numbers are changed to give it the appearance of a ৳500 note.