In general, trekking permits are typically issued upon arrival in Nepal because the Department of Immigration needs to verify the details with the original passport and the required visa information. However, there are certain circumstances where permits can be issued in advance. To facilitate this process, we will need the following documents in electronic format: -A scanned copy of the main page of your passport. -An electronic copy of your flight tickets to Nepal. -If you have already obtained a visa for Nepal in your home country, we will also need your visa number.