You must hold a valid passport to enter Nepal. Your passport must be valid for 6 months beyond the proposed duration of your stay.
If you don’t have a passport, apply for one in good time. If you do have a passport, check the expiry date.
To apply for a Nepalese visa in the United Kingdom you should contact the Nepalese Embassy, 12A, Kensington Palace Gardens, London, W8 4QU (Tel: +20 7229 1594 or 6231 or 5352); (Fax: +20 7792 9861) Full details can also be found on their Website: http://www.nepembassy.org.uk
Visas are available on arrival at Tribhuvan International Airport and at certain land borders. You may pay in UK Pounds or US Dollars (current cost is US$40) at the airport, and you should bring one passport-sized photo. If you wish to stay for more than 60 days you can extend your visa up to 30 days by applying to the Nepalese Department of Immigration at Kalikasthan, Kathmandu (Tel: +977 1 4429659); (Fax: +977 14433935).
Overstaying without authority is serious and you can be detained or refused permission to leave until a fine is paid.
Please note that old or damaged US dollar notes are not accepted in Nepal.