If the Cullen Family moves around, how does Carlisle continue to practice medicine w/o having a doctorate that's 100 years old in Twilight?

If you read Breaking Dawn, they mention that they use J.
Jenks to get paperwork illeagaly. Prehaps J. Jenks has made him illegal, but more recent
medical school degree papers.

EDIT:
I'm sorry I just realized the person above me, posted the same idea, but written much
better. But the person they get their illegal documents from is named J. Jenks and they
talk about him in breaking dawn.