Put PO Matched (3-Way Match) AP Invoice Invoices on hold on purpose

Summary

Put PO Matched (3-Way Match) AP Invoice Invoices on hold on purpose

Content

Hi Experts,

I am looking for an option to put Put PO Matched (3-Way Match) AP Invoice Invoices on hold on purpose.  The intention here is to Put every PO-matched AP Invoices on hold "on purpose" before AP Invoice validation is performed. 

We have around 30,000+ suppliers, so the moment PO Matched invoices are being entered (via OCR, Spreadsheet, Manually enter invoice)  should be put on hold.   

What is the most effective way to do the same? (please provide the steps too).