My question involves collection proceedings in the State of: California

Hello,

I was the student and my father was the PLUS loan borrower. All loans taken out in the year 2010 or later (if it matters).
My questions are:
What happens if my father stops paying the Direct PLUS loan for a short length of time?
What happens if my father defaults on those loans?
What happens if my father consolidates the PLUS loans and then does the defaults on that?

I would like to know both the effects on my father and on me.

Thank you for the information!

p.s. I am completely lost as to whether or not the title pre-fix is appropriate. sorry in advance.