By that, I assume it was changing her MI license to a WA license. If so, that makes no fucking sense, since there's no law anywhere that says you have to live in the state you work in (Excepting government, police, fire, emt and other services and a few other ones). I know I've moved to a new state for a job and used my old license as proof of ID and I damn near guarantee at least a small handful of people here have as well. It's non-issue.
And even if she was taking the DL test for the first time, that still means she has a state ID at the very least.
Just how little can someone be aware of the real world that they would create an excuse like that which is so far from the truth to be fantasy I'll never know.