When expenses are logged in a foreign currency and automated FX rates are enabled, the user has the possibility to edit the exchange rate to match his credit card charge in his base currencies. Simple mistakes or even mis-use of the FX rate can cause a big difference in the expense amount in the base currency. With unfamiliar currencies, those mistakes are very difficult to detect for the approver. Is there a warning or policy violation flag if the inputted FX rate differs too much from the automated FX rate of that day?

Thanks