Parents who want nothing more than to have their child earn their degree, yet are unwilling to share the tax information required for the student to do the FAFSA.
I've had multiple students experience this, and it can be frustrating, but I think it's important to address this with empathy for the parents and help the student role play the conversation. One of my students was able to get the information from their parents by remind the parents that college graduation was a shared, family goal, but they wouldn't be able to reach that goal without doing the FAFSA.