On the Late Fee Manager Settings page, scroll down to the Late Fee Policy Section:
This is where you define when and to whom we should send late fees.We default to sending late fees to all of your customers (Charge All), but you can also opt to not charge any customers late fees (Disable Late Fees), select which customers should receive late fees (Charge Selected), or select which customers should be exempt, or "waived," from getting late fees (Waive Selected).
If you choose either Charge Selected or Waive Selected, a Select Customers button will appear. Click the button to select which customer should receive fees (or which should be exempt).
Once you have selected your customers to be charged (or waived), you can define your Grace Days and your Fee Recurrence. Grace Days are if you want to give your customers a few days after their payment has become overdue before you charge them a late fee. For example, if I had an invoice become overdue on the 1st of the month and I had set my late fee policy to 5 grace days, that invoice would generate a late fee on the 6th.
Fee Recurrence is how often after a late fee has been generated should another late fee be charged, if at all. You can set this to "no", like in the example above, if you only want to charge a late fee once, no matter how overdue an invoice becomes. If you want a recurring fee, like once a month or every 15 days for example, simply change this to Yes and choose the frequency.
Once you have set your Late Fee Policy, simply click "Save" at the bottom of the settings page. You can also check out our tutorial video on setting up your Late Fee Policy here: