Blocking sales order for past due vendor

Hi eberybody,

On Acvount Receivable, I set dunning letter with blocking customer witch could be on past due. I have a couple of question.

When a customer is on past due :

1 - What is blocked? Quotation ?  Booking the Sales order? Confirmation of the sales order?

2 - Does deliveries are blocked to?

I would understand what is process blocked in order to fix the correct rules in my company. Also I want for this situation (past due) assume that no new sales order can be booked in order to don't impact the MRP and manufacturing.

Thanks for your help.