Ha, we have the same system. The travel system always thinks that leaving Stansted at 6am is a reasonable flight option for someone that lives near Gatwick. I am not convinced there is a good time to be at Stansted but I am convinced that if there were, it wouldn't be 4am. It regularly emails my boss, like a little tattle-tailing robot. We're supposed to out everything on the corp Amex too, a policy somewhat stymied by the fact most of the world doesn't accept Amex. Everyone except, it seems, our T&E policy team knows this.
To this day, I don't know know what a VAT receipt is. I asked a hotel for one once, and 15 minutes later I gave up and figured no one knows. They get a scan of whatever was given me. It's a happy day once a month I sit down with the stack of receipts and try to remember where I've been and why I went I there and what the hell was that one for?
Yes, I've had to explain that bus and 'taxi' drivers in Africa don't generally give receipts. One convenience of Uber is that it at least goes direct on my Amex and comes with a receipt regardless. And they don't con you, though that would take all the fun out of Nigeria.