Small value transactions can be debited from a credit or debit card via telephone.
The customer dials an advertised national rate number and enters a product code along with any additional information needed.
The credit card details and security information can then be entered via the phone keypad to ensure that the card is valid. Once the card is authorized the payment will be deducted while the customer is on the phone line.
A credit card merchant account is needed for this type of transaction.