It makes no sense for you to send us the electronic or paper bills you receive during the month. 

With your bank and credit card statements we see all the bills you paid during the month.

However at the end of the month we assume you have a few unpaid bills.

And we send you a reminder email called "Unpaid bills".

In this email is a link to a page where you list the unpaid bills for the current month.

We take care of the rest.