vandeluca, don't they ask you question when you're about to leave that country? I know of this Indian co-worker who traveled to Nepal recently. She holds both Indian and US passports but when she tried to enter back from Nepal, she got grilled because she used her Indian passport to enter Nepal (she didn't need visa) but when she was returning back to the US, she presented her US passport and they asked her why she was in Nepal w/o a visa.
