Ceiling moisture is below another residence
Keep timestamps and room locations for the building contact. A stain shows where water appeared, not necessarily its origin.
A ceiling stain locates the damage
Moisture beneath another residence shows where the symptom reached your unit, not which owner or system caused it. Give the building contact dated observations and the room position. Do not ask anyone to enter a dangerous ceiling area or operate neighboring fixtures as an informal experiment.
Keep source evidence separate from responsibility
Ask what access is needed to investigate the source and which opening, if any, is justified by the findings. Repair responsibility depends on the relevant property documents rather than the stain alone. Clarify who can approve source work and who handles your affected ceiling finish before those decisions are combined.
Locate the leak before repairing finishes
Ask how the source is investigated without deciding repair responsibility from the visible ceiling stain. Detection, pipe work and restoration can need separate authorizations.
Related service information
Pelican Bay area guide and ceiling, wall & interior pipe leaks. Our Naples water leak service homepage explains the wider scope.