mismatch of ITC

now dealers in Karnataka receiving notices for mismatch of ITC claimed in 3Bs
As I know some dealers not filed R1 or not uploaded sale bills.
Now the problem is with buyer
he has to see weather seller filed R1 or not

First we hv to download (it is a time spending job and irritating) GSTR

then we have to check which bill not uploaded ?

Then we have to search that GSTN and decide he filed,saved .....

Then we hv to intimate him to file,the 1

we have to reply the non filers GSTN, to notice issuing authority in ASMT 11

this is the process.....

if they allow us to add back invoice in GSTR 2 ,then this problem will not arise ,but they don't want it, inspector Raj.......