Expense Management: Credit Card related Qs

Hi All, our client has a unique requirement in terms of credit card processing in Exp Management.

I understand there is a standard scenario where client employees are given corporate credit cards. If they use it, the credit card company (say AMEX) sends statements to the client and then those are entered in JDE attached to an employee profile.

However, of client has one other Corporate Credit Card  (not linked to any employee as such) using which all travel related expenses are paid. Client would like to know how that can be handled via AP/Exp Management. Point to note is that employees do not have to include these expense items in their expense reports and the feed that corporate credit card company sends do not contain employee number. Client also would like to know how could these be coded to go against correct projects/BUs for which expense was done?