Reminder Fee (1st, 2nd, 3rd) where stored?

[musti19]

Hello,

i migrating my old billing system to whmcs.

so i have invoices that is unpaid and i send invoice reminder with fee already.

But how whmcs works?where in sql datebase is this stored?

 

example in my old database:

for 1st invoice reminder :

reminder_status= 1

for 2nd invoice reminder:

reminder_status= 2

for 3rd invoice reminder:

reminder_status= 3

 

thank you

[WHMCS John]

It's simply based on the service's Next Due Date under the client's products/services tab.