Sending Statements to customers with outstanding invoices

Our Finance Team have recently enquired as to whether it is possible to automate the sending of Statements to our customers.

Currently we are sending around 120-150 statements a month and following a request to the team at aXcelerate, we have been advised there is no process that can be used to streamline/automate this process. 

It would be great if we could set parameters around this process and either automate or send as a monthly batch rather than having to send individually every month.