Nothing changes other than the logo on the monthly bill...and you’ll have to set up a new online account with new holder if you do paperless billing. My mortgage (VA loan) was originally Countrywide. They went under then I’ve lost count of how many times it changed.
Eventually I refinanced with my Credit Union for a 2.7% rate. It’s been there ever since.
Yay, thank you for the solid info. We have Pennymac. The mortgage was originally through the builder’s financing arm and they sold it to Pennymac after the house closed. I’m hanging on to that mortgage unless/until we sell the house, or should interest rates somehow magically collapse. (Fat chance of that, I think.)