Communication of error demands

Deepak (----) (91 Points)

08 December 2011  

We have received a communication of error of demand in several cases. What in most of them we dont have any liablity. So I would like to know how can be rectify those defects ??  Please clarify on an urgent basis.

We have two options either to prepare a letter in reply or to use online process of rectification upload ??????