Cenvatable excisable invoice

Joginder Singh Bhatia (PROPRIETOR) (37 Points)

01 November 2011  

A ( Excise registerd Trader) buys goods from B (Excise Registerd Manufacturer) by paying ED.

Now A sells to  C (Excise registred Trader) by Cenvatable Invoice and passes ED to C

Question

1. As a proof of ED paid to B what document to be submitted ?

2. Is it possible for A to hide his source of purchase ie B from C and if yes how?