Let's say you can have some sort of surgery through the powers of superscience to transfer your consciousness into another body. They'd need a method to prevent all sorts of crimes, I think.
Someone kidnapping a wealthy person and forcibly swapping bodies
Transferring the mind of a child into an adult (the ethics of treating a four-year-old girl as an adult just because of their body being swapped are questionable)
- A criminal avoiding detainment by swapping bodies
- We'd need to avoid children having the surgery because nobody wants an emotional one-year-old throwing a tantrum with an adult body
I figured maybe there could be a mark or traditional scar that shows a person had the surgery, but that wouldn't really help much. What could the government do to keep track of who's who?