What happens if the location changes over time? I guess nothing right?
Why would anything happen? City names (and, more frequently country boundaries) change. A kesubah, like any sh’tar, has to have the correct place at the time that it is written and/or goes into effect. It does not have to be correct after that.
Can you imagine what would happen if that were not the case and all the gitten written in a city suddenly became passul because the name and/or country changed?
The Wolf