I'm confused about this part:

>A mortgage has a quirky little subcomponent called a Mortgage Servicing Right (MSR). Every month, it needs to collect money from the borrower and send that money… somewhere. This implies, minimally, a mailbox where you can send checks, someone to open the mail, and a phone number with a CS representative who can answer questions like “What is my current balance?” and “Did you get the last check I sent you?”

I thought mortgage payments were mostly done electronically now?