It is not correct to deface currency notes by writing on it. Now after the release of new currency RBI said it was brought to its notice that members of public and institutions write number, name or messages on the watermark window of banknotes and thus deface the currency. The watermark window has an important security feature which distinguishes it from a counterfeit note. Any defacement on the window will not allow the common man to identify one of the features of a genuine note. The public is therefore requested not to write anything on Rupees.