Time Dependent Notification

[M I]

We are planning to do a workflow to process quantity
errors in the invoice receipt process.  Some of these
errors occur because the invoice has been sent in
before the goods receipt was even due.
 
The client doesn't want invoices that can't be
processed yet clogging up people's inboxes.
 
Is there a way to delay sending the error notification
until x days before payment due date or y days after
invoice posting date?
 
thanks in advance
 
Murray
 
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