Why registers drift in mixed-use buildings
A mixed-use building accumulates access holders faster than any single-purpose premises. Retail tenants, upper-floor offices, a strata manager, maintenance trades, a security patrol and residents all hold something. Keys are cut for convenience, fobs are handed over during a tenancy change, codes are shared verbally when someone is away. None of it is recorded because each individual instance seemed minor at the time.
The cleaning contractor is usually the most visible holder because they attend most often and outside hours, which means they are also the first party asked about any access question. That is a reason to keep their part of the register precise even if the rest of the building's is not. A contractor who can state exactly what they hold has removed themselves from an otherwise unresolvable conversation.
