Another thread on the American Airlines board made me think of this.

I'm not talking about actual fraud where you are stealing from your employer / client. I talking about things you do so that legitimate business expenses slide through without having to answer a bunch of questions about them?

I'm not required to use a corporate travel agent, so I get a little more flexibility that some, but here are some of the things I do:

• If only first class is available on a given flight (or if its cheaper than full fare coach), I'll modify the HTML code on the electronic receipt to make it look like a full-fare coach ticket. Just so I don't have to deal with HR questioning my booking in first.
• Receipts aren't required for meals under $25. I seldom spend more than $10-$15 on my dinners (personal preference), so if I have some "unusual" expense such as paying for internet access someplace, I'll just tack it on to a cheap meal one day rather than separately identifying it on my expense report.

I'm probably doing myself a disservice since I'll be faced with even more questions if these "fraudulent" activities are ever identified. But, I always feel like I know that my expenses are legitimate and I really don't want to be dealing with having to justify them to some office-bound HR staffer.