Moreover, to ease travel, persons over 65 and below 15 years can show documents with photographs to confirm their age and identity. These include PAN card, driving licence, Central Government Health Service (CGHS) card and ration card but not Aadhaar.
"Aadhaar (UID) card is not an acceptable travel document for travel to Nepal/Bhutan," a communique issued by the ministry said.
The advisory assumes significance as Aadhaar is mandatory for a host of things, including government subsidies on LPG and other social welfare schemes.
The Aadhaar card, which has a 12-digit unique identification number and personal details like name and address, acts as a proof of identification and residence.
Indians entering Bhutan by road are required to obtain an 'Entry Permit' on the basis of a valid travel document from the immigration office of Royal Government of Bhutan at Phuentsholing, located on the Indo-Bhutan border opposite Jaigaon, West Bengal.
Nepal shares borders with five Indian states--Sikkim, West Bengal, Bihar, Uttar Pradesh and Uttarakhand. Around six lakh Indians are living or domiciled in Nepal.
Bhutan, which shares borders with Sikkim, Assam, Arunachal Pradesh and West Bengal, has about 60,000 Indian nationals, employed mostly in the hydroelectric power and construction industry. In addition, between 8,000 and 10,000 daily workers enter and exit Bhutan everyday in border towns.
In another development, Indians flying abroad will not be required to fill departure cards from next month.
However, those going out of the country via rail, seaport and land immigration checkposts will have to fill the embarkation card. "It has been decided to discontinue the practice of filling up of the departure card by Indians at all international airports with effect from July 1, 2017," an order issued by the home ministry said.