According to a proposal, NRIs in future will be able to submit RTI application by paying equivalent amount in foreign currency to Indian embassy.  Read the news below:

http://www.ndtv.com/news/india/now_online_right_to_information_applications_for_nris.php

According to the proposal mooted by the ministry, an NRI will now be able to deposit Rs 10 as RTI fee in the equivalent local currency at the Indian Mission abroad and send their application through email to the concerned public information officer informing about deposit of fee.