There are a couple of other ways to deal with customers' fraud concerns :
Making your site as trustworthy as possible and addressing concerns about fraud and security may persuade some cautious shoppers to go ahead and make a purchase. Provide reassurance throughout the site, especially on product and payment pages about privacy and security issues, also third party verification logos such as VeriSign provide evidence that a site can be trusted. Shoppers also want to see contact details for reassurance that they can get in touch if something goes wrong with an order. Previous surveys have shown that customers are reluctant to purchase anything from a site which doesn't provide these details.
Offer alternative payment options - some shoppers that are reluctant to enter credit or debit card details may be persuaded to buy if your site offers a payment method such as PayPal or Google Checkout. This may also increase conversions; in a recent US survey by TrialPay, 59% of respondents said they would be more likely to buy online if alternative methods like Google Checkout and PayPal were available.