Immigration officials arrested a Pakistani national at Suvarnabhumi airport on Saturday with eight credit cards and US$2,000 in counterfeit banknotes.
Muhamad Shafique, 25, was arrested after authorities searched him while he was at Exit 4 in the arrivals area of the airport.
They found four CitiBank credit cards and another four issued by Barclays Bank, and four US$500 bills and arrested him after verifying that all were counterfeit, said Pol Col Vitoon Deecho of the Suvarnabhumi Immigration office.
Mr Shafique had flown into Thailand from Islamabad on Pakistan International Airlines flight PK 892, according to police.
He told officers that he was a tourist and denied that the credit cards and the banknotes belonged to him. A friend in Pakistan had asked him to carry them to a cousin in Bangkok, he added.
The police were unconvinced and suspected him of using fake credit cards in Thailand during the long holiday.
Mr Shafique was charged with possessing counterfeit money and credit cards.