Individuals move or change internet service providers quite a bit so it is not a unheard of thing for your IP address to change. The only way you would run into a problem is if you log into FusionCash on a public IP address from somewhere like a airport/hotel/wifi hotspot that is public or if you try to log in from an IP address that all ready has someone signed up under FC on it. There shouldn't be any reason to worry, this question has been answered a lot, I asked a similar questions months ago regarding using FusionCash while traveling. If you take a few minutes just use the search feature to find more details about moving and traveling while using FusionCash. Good luck with the move!