Global payment giant Visa has said its contactless payment cards are safe and that fraudsters cannot steal money or copy card details, allaying concerns raised by security experts.

The defence comes soon after Visa New Zealand reported that its monthly volume of transactions made via its contactless payments technology topped 1 million for first time in October.

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Recently, few security specialists voiced their apprehension about cheap point-of-sale scanning devices sourced from China which could hack the information stored on credit card microchips.

Visa New Zealand country manager, Caroline Ada, was quoted by interest.co.nz as saying that she was unaware of a single instance of "electronic pick-pocketing" occurring.

Ada advised users to hold cards in close proximity to a terminal, and make payment only when it was live.

However, she acknowledged that it was possible such devices could be used to scan a card, but said a different code was transmitted every time, and couldn’t be used to make a replica.

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"You don’t take the card number, you don’t take the expiry date, you don’t take the CVV [three-digit security code]," she was further quoted as saying by the website.