Body-snatching has always been a hot topic within the Cultivation World.
All the major sects have taken precautions and developed an extremely comprehensive prevention system.
This includes carrying treasures that defend against the soul attacks and figuring out how to identify body-snatchers.
The latter is often the more crucial element, as there is no such thing as guarding against a thief for a thousand days; offense and defense are always annihilating each other. It is better to focus on deterring the great powers capable of body-snatching, making them understand that body-snatching the chosen ones of their own sect means certain death.
Thus, for the True Disciples of the major sects, there would be a minor inspection every ten years and a major inspection every hundred years.
Taking a first-class sect as an example, the minor inspection would be conducted by at least a Mahayana, while the major inspection required at least a Dao Realm Venerable.