Throw error and stop "posting" for mismatch invoices

I have setup Invoice tolerances DA, DQ and PP. I have two types of invoices

- Manual invoice in SRM

- Invoices from third party tool to SRM

for both, I want the system not to post the invoice if the tolerance is exceeded. Currently my system throws an error message but its allowing to post the invoice with the status "Invoice XXXXXX created but not forwarded to Accounting". I know this is not account posting but still I don't want to post the invoice at all.

this is a standalone system. your ideas are appreciated.