You will be shocked after seeing this image and video confirm that there is a small Printing Mistake while making Rs 50 New note.
It has been found that a white dot is there in some note at back side of the Rs 50 new note.
See the below image which clarify that in picture 1 there is no white dot while in picture 2 you can easily see a white dot, which is marked by Red circle.
May be no one mark that there is a printing Mistake, but while scrolling the whole bundle you can clearly see the white dot is moving. Means in some note there is dot and in others there aren’t. Check this Video on YouTube.