What are the conditions for registration ?
Are you moving her for work or no?
I've been living as a foreigner in Krakow for almost 2 year's.
You should register your stay more than 3 month's, but me for example I didn't get the necessary document's declared until after 1 year and 4 month's, and nobody noticed or contacted me regarding this.
So just move to Poland and take it as it come's.
If you move here for work, your employee will be able to help you with this.