The customers are obliged to provide us with the scanned copies of their passport and at least 25% payment of the total trip cost in advance as a deposit in order to book any trips with Nepal Mountain Trekkers. Please be noted that the deposit amount is nonrefundable. Whereas, you can pay the rest of the amount upon your arrival in Kathmandu before proceeding for the trip or you can pay the total amount in lump sum whichever is suitable for you.