How can accept a payment by credit card?

To accept credit cards you will need what is called a merchant account. A merchant account is basically a relationship between you, the bank ans a merchant services company.

There are 3 types of merchant accounts, internet, Retail and wireless.

Internet merchant accounts are obviously for internet stores.

Retail merchant accounts are for business with a storefront were the customer pays you in person.

Wireless merchant accounts are for business such as taxicabs, tradeshows, etc who process credit cards in person but not at a store or physical location.