Can commercial invoice do CCPIT commercial certification of

The commercial invoice to Saudi Arabia needs CCPIT commercial certification of CCPIT, but the customer asked us to make the amount lower. Today, we took the information to our local CCPIT for certification. The staff of CCPIT asked us to provide the customs declaration form. However, if we provide the customs declaration form, the staff of CCPIT will surely see that our amount is inconsistent, so the commercial invoice is definitely unable For authentication, it is said on the Internet that the commercial invoices of CCPIT in some provinces do not need to provide customs declaration forms, and they want to be certified in other places through the help of agents. I don't know whether the CCPIT commercial certification of CCPIT can be handled across provinces?