Rupee one notes are issued with the signature of the Secretary, Ministry of Finance, Government of India while notes of Rs. 2 and above are issued with the signature of the Governor of the Reserve Bank of India. The paper of all genuine currency notes is superior rag paper that has a distinct crackle when new, though the crackle reduces as notes become worn from circulation in humid environments. The source of this information on features of genuine currency notes is the Reserve Bank of India website.