CST - Forms E1 and E2

Sir,

can anyone explain how will it work in the following example - 

A from delhi sells goods to B in mumbai who further sells the goods in transit to C in Punjab. Now, Practically the movement of goods is from delhi to bmy and cannot be diverted to punjab midway till it reaches mumbai. After the goods reach mumbai, they have to be practically re-booked in another transport for Punjab...

SO WILL THIS CONFIRM TO SALE IN TRANSIT ?? IF YES, HOW ?

Suppose A(1st seller) from westbengal sold some goods to B of karnatak and thereafter B will sell  it to C who is from Westbengal. Now B (Karnatak) wants that A (westbengal) will directly deliver this goods to C. how will  the billing be done from the point of view of A ??

Pls reply.its urgent..

Please Help me 
Someone please give Detailed Answers of following 

1) When(time) should the seller issue form ' E1 or E2? 
                 Should it be given After the Interstate Sale or before ? 
                                                      or 
                         Should it be given along with the invoice ?
                                                      or
                          Can it be issued at the end of the year ? 

2) When(time)should the buyer issue form 'C"?

3) When(time) should E1,E2,C forms are to be submitted to the department?  

Please answer each question separately.  

Thankyou

format of E1

Please educate me in the following. This transaction pertains to 2012 before Andhrapradesh was separated.

A- Buyer ( Hyderabad, formerly Andhrapradesh), B - seller (Bangalore). C - consignee in Rajamundry (Andhrapradesh)

B sells to A at 2% against form "C" clearly mentioning C as consignee in the invoice.

Is this governed by E1 / E2 sales where A gives "C" from to B and B gives E1 to A.

If yes is there any rule / section in CST act. 

Please educate.

M.Krishnamoorthy
 

Please Tell me the Difference Between C form and E1&E2form

Dear sir,

plz explain me whats is main purpose for issue e1 and e2 form for inter-state sale time.