GST fake bills

Arunachalam (Proprietor) (191 Points)

06 July 2018  
Just came to know that a few people used fake sales bills and didn't actually make any supply of goods or services. What is the use of producing fake sales bills? Don't they need to pay tax for those bills generated and exchanged? Also, what benefit the receiver get out of this transaction? Can anyone help me understand this with an example?

Thanks in advance.