An online record says an object is not on display. That statement concerns access in the galleries; it does not erase the object’s catalogue entry or establish that it has disappeared.
Separate research access from gallery access
The record may still provide photographs, dimensions and a bibliography. Those resources can support a reading exercise even when the physical object is unavailable to visitors. Do not treat a digital image as evidence that you can currently see the object in a particular room.
Check the date and the intended visit
Display arrangements can change. Before making a journey for one object, consult the institution’s current information and appropriate enquiry route. A saved screenshot of an old gallery label is not a promise about today’s installation.
In your notes, keep display status in a field separate from identity and material description. Add when you checked it. This small distinction prevents a useful research catalogue from becoming an unreliable travel plan, while allowing the object to remain part of your study even when its public display has changed.