Renunciation Certificate... What does "Rupee Paper" mean?

[RP48819]

I am a naturalized US citizen  applying for 5 year visitor visa for which "Proof of Renunciation" of Indian citizenship is required.

 

http://www.cgisf.org/page/display/303

What proof of Indian Origin can I provide if I don’t have my Indian Passport?

If you do not have a copy of your Indian passport, you can provide:


 Notarized copy of educational certificate issued by an institution of India and land ownership certificate by which eligibility may be reasonably ascertained

OR

A duly notarized affidavit to that effect - Any notarized affidavit of birth in rupee paper is not acceptable as proof of Indian Origin. The proof must be copy of actual Indian Birth Certificate.
 

 

Not clear on the text that I have quoted in red above... What exactly is "rupee paper"?

 

 

[GcLLC]

Let me take a guess: Stamp Paper.