Fake notes

As I was traveling to work, I was stunned to find a lady of about 35 years sitting at the road-side burning a bundle of new 100 ruppee notes!
I stopped my bike, staring at her and wondering if I was watching a mad woman!
I asked her why was she doing that. Her reply stunned me further. She says that it was a bundle of fake notes! I asked where she had found that. She said that she had found the bundle in the dust bin while foraging. I don't know whether this was the truth but this fluke peep into the crime world left me quite a bit shaken!