Duplicate Invoices (Different Dates)

Problem

The system is generating multiple invoices for the same service on different due dates.

If the invoices are for the same date, see Duplicate Invoices (Same Dates).

Cause

This issue may be due to a service due date that is in the past. Generally, this occurs when you import or add services with a Next Due Date of 00/00/0000. When WHMCS attempts to generate all invoices between that date and today, duplicate invoices result.

Solution

To resolve this issue:

  1. Go to the client’s profile’s Products/Services tab and select the service that is generating multiple invoices.
  2. Set Next Due Date to the date of the client’s next payment.
  3. Click Save Changes.

You can now safely delete any extra invoices for the client.

Last modified: June 5, 2024