Fraudsters are using online services such as iTunes as a testing ground for stolen credit cards, a report warns.

Criminals use iTunes to test stolen credit card details because the cost per track is sufficiently low that no warning will be sent to a legitimate card holder of the transaction.

If a transaction succeeds, then a fraudster may immediately move to purloin more goods, or may wait a little while. This has prompted card issuers to warn users to check their credit card statements and to confirm they are aware of any smaller transactions listed there.

The Mail on Sunday report carried a warning from the credit card arm of the John Lewis Partnership, which has 600,000 customers and is calling this the ‘iTunes fraud.’

Credit card users are also being urged to join Verified for Visa or SecureCode for MasterCard to introduce another level of protection for credit cards used online.