Golem Ownership Transference

Let’s say that you wanted to sell a Golem for a profit, that has been alive and under your command for a long period of time. The buyer won’t want to make the transaction unless they can be assured that they and they alone would be able to issue commands that it would follow.

Implicitly in the Manual of X Golems, a Golem is a creature that follows your spoken commands for as long the both of you are alive. Would it be possible to fully transfer command to another living creature?

Additionally, how could someone else command a Golem if you cannot give a command to do so, i.e. the original creator dies?