Why does QB include a "teletype" version of the invoice along with the PDF version when I email an invoice?

Hi there, userjenmatth. 

Thank you for stopping by the Community this afternoon.When you refer to teletype, do you mean the text that is based within the body of the email being sent out? If so you can change what the customer sees by changing the customer message. This article highlights how to change the greeting, how to send a global message update as well as how to print a message on a statement. 

I'm also including a helpful article highlighting how to take and process payments from your customers:

• Take and process payments in QBO. 

If there's anything else I can help with, feel free to post here anytime. Thank you for your help and have a nice afternoon.