$autoBill variable in email templates?

I have both recurring and regular invoices and I’m wondering how the $autoBill variable works in email templates…

Because it’s a var, I’m assuming if I put $autoBill in a template, such as the initial email, then it is only included if the invoice is in fact 1) a recurring invoice and 2) is set to auto bill, is that accurate?

I then have a reminder configured to be sent 3 days before the due date telling the customer that payment must be made by that date to avoid late fees, and would like to indicate if this is set to auto bill, meaning they can safely ignore the message.

Thanks

The autoBill variable is only used if auto billing is set to bill on the due date rather than the send date on Settings > Online Payments.