I have bought a centre speaker of Sonodyne from hifimart. However, the speaker was delivered from Sonodyne's ware house at Behala, Kolkata. I didn't require any forms. I am not sure if it is due to the fact that my product was delivered within Bengal or not.
On the other hand, while purchasing the speaker stands from Magma, he took care of the papers himself, but some tax related forms were required to be filled up.