Fake $1,000 notes reappeared at the airport yesterday when a Bangladeshi man tried to pay his departure tax with counterfeit money. The notes bore the prefix number KS987 and were a copy of Hongkong Bank's 1988 series. Police believe they are from the same stock printed by a syndicate still at large. They warned of an increasing number of fake $1,000 notes in circulation two weeks ago. Then, two mainlanders were arrested on their way back to China at Lowu checkpoint when they used fake $1,000 notes to buy clothes and cigarettes. The 32-year-old Bangladeshi man was checking in at the Korean Air counter early yesterday. Fourteen more fake $1,000 notes were seized from the man, who alleged he exchanged US$1,800 (HK$13,932) for 15 $1,000 bills with a Hong Kong man in Tsim Sha Tsui. He was detained for inquiries and the case was taken over by the Commercial Crime Bureau.