What are the reasons to spend hundreds of crores of our money replacing notes of Rs 10 , Rs 50, and Rs 100?

https://aajtak.intoday.in/gallery/rbi-expenses-on-new-note-printing-tedu-1-24105.html

Gowindan Nampoothiri, former General Manager PP (Retired )

Answered Jul 23

A currency note will not last more than 4 years ,it becomes shabby or torn or unfit for circulation.Those soiled notes coming back has to be replaced ,which are unfit for circulation .25 % of circulation in currency has to be replaced by printing

2.If GDP is increasing at 6 % ,proportionate additional currency has to be newly printed .

We do not print more than what is minimum needed

The color ,design and size are changed periodically to reduce the chances of forged /fake notes .This is a normal practice in all countries ,nothing new to India .