I'm wondering if anyone has an overdue invoice policy that they would be willing to share. We have an outstanding invoice from December for a considerable amount for a service provided to another organisation. We currently have a set time limit by which time the invoice should be paid, but nothing for when this date is reached apart from to send reminders and keep chasing for payment. I'm wondering if having a policy stating a late payment fee or interest will be charged after a certain point but looking for guidance on best practise for this.