A cash advance service is one that allows you to withdraw cash using a credit card.
Cash advance can be done either through the ATM, bank, or other financial agency. There is a credit limit, normally a percentage of the limit of the credit card.
Cash advances are convenient if you need extra cash fast. However, because a person is advancing cash on a line of credit, there are high interest rates.
Because cash advances can be an easy target for thieves, a credit card holder presenting an accepted form of identification must be issued a cash advance over the counter. Simply having a PIN number will not supply enough information.