Supplier holds for invoice

Hello,

When creating invoices,  we would like to put some holds fro specific supplier.

I've tried 2 ways but questions:

1- I created a new type for Minority classification for the concerned suppliers.  Now, how can I generate a HOLD for all invoices of those suppliers. Do I have to make some code or is there some parameters to define the Hold?

or

2- I used the Unvalidated Hold invoices in the Supplier Control Tab.  The message is not appropriate, can we change it?

or

Is there other way to handle Hold in that case?

Thanks!