Why the default is always leave it where it is
A bag under a desk might be forgotten or might be exactly where its owner intends it to be until tomorrow. A stack of materials in a corner might be rubbish or might be a project due at the end of the week. A cleaner has no way to distinguish between those cases, and the cost of getting it wrong falls on someone who was not there. Leaving property untouched is the only rule that works consistently across every room in a building.
The rule also protects the cleaning provider. Once staff start moving belongings, every subsequent missing item becomes a question directed at the cleaning team, and there is no way to demonstrate otherwise. A written no-touch position removes that exposure entirely and makes the answer the same regardless of who is asked. It is one of the few scope lines that benefits both parties equally.
