Is there any way to control PO Notification to be sent to Supplier

Summary:

For same supplier which is auto created ( As a result of Negotiated flag ), we want to send PO notification to supplier and for some we do not want to send , how to achieve this

Content (please ensure you mask any confidential information):

Few PO are invoice entry , but business wat to capture that invoice enrty as requsition and PO , but at the same time for those invoice based PO which are auto generated as a result of requistion , PO notification should not be sent to PO to avoid confusion.

For same supplier if normal PO is being created notification should be sent to the supplier to fulfill the order.