I suppose that's true and I would probably be worried about that if it was a smaller company or a company that had a real possibility of not being able to pay the bills. At my company that pulls in billions per year and has hundreds of thousands of employees that use this expense system that I've never heard one case of someone having an issue getting reimburses, it's not much of a worry to me.

We live in a post Lehman Brothers world...anything can happen. Personally would rather keep my personal expenses to my personal card and refuse a personal guarantee for any corporate spending, especially if it's going to average thousands a month.

Seriously, how hard can it be to bring both a personal and corporate card on a trip, and use each as appropriate? I've never had an employer issued cc but it's baffling to me that some employees have no problem personally guaranteeing company expenditures. I can imagine all sorts of scenarios, including a complete unexpected collapse, that would leave the employee out to dry.