Lesser Quantity recieved

Hi,

My query is

A Company recieved certain excisable goods from company B, if B company has invoiced say 250 Kgs of some excisable commodity to A, but A company has recieved on 220Kgs of same goods and settled the transaction for amount equal to worth of 220 Kgs only.. Can A Company avail input excise credit for whole 250Kgs, as the invoice from B is claiming to have removed 250Kgs of product from its factory?

I came to know that the a company can avail full excise credit if final settlement amount is settled at lesser than invoice amount.. but i want to clarify if this facility is availble only for discounts or even for instance said above

Thanks in advance.. am waiting .... Ciao