Why does the customer follow-up feature not suggest a customer who has not paid an invoice?

If a customer has not paid an invoice but does not appear in customer reminders, it is because, considering all of their payments and invoices to be paid, they do not owe you any money : his customer balance is negative.

In fact, customer reminders do not consider invoices individually, but are based on a calculation of the customer balance, which is done from customer movements:

• You have this information at the bottom of the statistics tab of the customer file.
• You also find it on the customer movements page by filtering on the customer.
• And you have an aged balance report, available in “Tools > Reports and Editions > Aged balance”, which is the heart of your monitoring of your collections, and a customer balance report.