How to detect forged credit cards and debit cards

There has been a rapid increase in forged credit cards in Korea. This is because there has been a proliferation of credit card copying machine sold on the internet enabling anyone to easily make copies of cards. Although credit card information can be stolen when making purchases abroad, credit card information can be also be stolen by crooks pretending to be part time workers at convenience stores and gas stations. Credit card duplication devices have also been installed at ATMs, leaving many victims helpless.

Fluorescent security features are hidden inside credit cards and debit cards to prevent forgery. Although the exact details depend on the particular type of card, typically there is at least one fluorescent security feature on either the front or the back of the card. It is recommended that stores verify cards if there is any suspicion that a card has been duplicated when high priced items are being sold.

The card pictured below is a visa debit card. Under ultra violet light, the letter V in in visa turns fluorescent blue. In addition, if the IC chip portion of the card is put under ultraviolet, it turns fluorescent pink.

Specific sections of the card may also emit fluorescent light when placed under ultraviolet light. Although usually nothing in visible under natural lighting conditions, two out of three cards turn fluorescent yellow or fluorescent orange when when placed under ultraviolet light.

[Natural light]

[Under UV light]

Depending on the card, fluorescent security feature may be embedded in the signature line on the back of the card.

Although newer IC integrated chip cards are known to be safer than magnetic strip cards, it is also true that IC chip cards are currently being duplicated. In the year 2014, 23 billion Korean won was charged to cards that had been stolen or duplicated by third parties. Please ensure that you sign the back of your card. Card users and stores that accept cards must be alert to guard against card fraud.


You can contact us : uvleddetector@mv21.co.kr