At this stage (more than 3 weeks late payment), the situation becomes alarming. No minor reason (check lost, accountant out of office ... etc) can justify this delay.

Your client does not pay due invoices either because he doesn’t want to pay or because he can not due to cash issues.

You have to mobilize your business actors who can intervene with the client (sales manager, director ... etc) and send a new dunning letter with acknowledgment of receipt requiring immediate payment.

Require from your customer to pay late payment penalties to offset the cost of overdues. The payment penalties in case of late payment is mandatory in several countries (EU for example). In addition, requesting late payment penalties will help to educate your customer to pay you on time.

Collection level 2

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  My DSO Manager, the online debt collection software

  My DSO Manager offers powerful features to make quality reminders at the right time.
  
  They are triggered depending on the recovery scenario of each customer and the situation of the account (overdue invoices ...).
  
  Recovery documents are dynamically generated through #Hashtag and are customizable for optimum efficiency. See the demo.

The intervention of the sales representative is often very effective at this stage for the simple reason that he does not have the same contacts as the person responsible for bill collection, who is in connection with accounting services. He will use his personal relationship with the purchasing manager or director of the company to achieve a quick release of payment of bills due.

 Use the blocking of the account as a recovery tool: "we will be able to deliver your last order upon receipt of your payment". This will be enough to convince many clients to pay you. If your client is unable to pay your invoices, blocking deliveries will limit the potential unpaid amount.