I'm surprised so many companies are requiring the use of a specific card for reimbursement. I've seen companies that say "If you can't qualify for a Corporate AMEX, we can't hire you" because of the travel reqirements of the job, but I've yet to find one that when they tell me to get a corporate card and I reply, "No thanks, I have several personal cards already and don't need another showing up in my credit reports" they just accept it and move on.... Of course, once you accept their offer and get the card, you have very little room to negotiate whether or not it's used for travel expenses.