Updated at 6.47pm: Police have made Hong Kong's second largest seizure of forged credit cards, officers from the Commercial Crime Bureau revealed on Thursday. Officers first arrested a 31-year-old in Mai Po Village on Wednesday after finding two forged credit cards on him. 381 more cards and some equipment were uncovered after a nearby village house was searched. The man, who had confidential information relating to 402 accounts, was said to be the sole owner of the factory. Senior Superintendent Raymond Lau Chi-keung said if all the cards had been used in the market, the potential loss suffered by the banks could have been as much as $13.3 million. However, he believed not many of the cards had used as the factory had only been operating for three weeks. Superintendent Lau said the account information had been stolen from both local and overseas card holders. Gangsters would use cards containing local holders' information to spend overseas and vice versa to lower the risks. Superintendent Lau said the cards were of a good quality and that an alert eye was needed to spot defects. ''Some English spellings are wrong and there are no security codes under the trademark of the issuing companies.'' Superintendent Lau appealed to the public to always be on their guard against credit card crime. Up to September this year, 103 people have been arrested of using counterfeit credit cards and a total of 781 forged cards have been seized, including Wednesday's haul. The man has been charged with manufacturing counterfeit credit cards and will appear in Eastern Magistracy on Saturday.