How can I be sure my purchased slot won’t be moved or altered?

If you see the ability to purchase a Monument Slot, it means the park is in Public mode.

Once a park becomes Public, its layout is locked. The creator can no longer modify the map structure, move slots, or change their placement.

This ensures that when you reserve a specific slot location, the surrounding structure, layout, and positioning remain stable.

Public parks are intentionally designed this way to provide predictability and fairness for everyone participating.