Business Travel Account. If a company has a corporate credit card program where certain purchases such as air, rail, and associated transaction fees are centrally billed to one “master” credit card number, this is referred to as the Business Travel Account (BTA). This account allows for the purchase of certain air travel expenses for corporate employees without the need to issue individual credit cards to each traveler for the designated expenses. Because the account has no physical card, it’s often called a “ghost card”.