Related to itc can be claim which only reflact on gstr2a with addition of extra 10%

NITESH (ACCOUNTS) (35 Points)

16 February 2020  
my question is that,if we are ready as per above subject and following queries arise:

1) if party has uploded any wrong cn on portal for that which we are not suppose to agree or we dont want to accept.
2) cn or bill are only for there internal purpose means they might have reversed in next month.

so how we can take the bill/dn ,which actually we are not agree ?