What counts as an unexplained absence
An unexplained absence is when a person receiving care is absent from the care service and their whereabouts are unknown or unaccounted for, in circumstances that are out of character or that raise a concern for their safety. The SIRS category is defined by there being reasonable grounds to report the absence to police. In a home setting it must be an absence from the setting during the delivery of funded aged care services (Aged Care Rules 2025, s16-5(11)).
From 1 November 2025 the old home services "missing consumer" type and the residential "unexplained absence" type were merged into one type that applies in every setting. The reasonable-grounds-to-report-to-police threshold is what brings an absence into the reportable category. An absence that is fully explained and consistent with the person's plan and choices, for example a planned outing or an agreed independent activity, is not an unexplained absence.
Why it is always Priority 1
Because an unexplained absence is defined by reasonable grounds to report it to police, it is always Priority 1 (Aged Care Rules 2025, s165A-25(2)). You do not run a separate severity assessment to decide the priority: the 24-hour clock applies from the moment your organisation becomes aware. In practice, awareness and the decision to contact police often happen close together, but the SIRS clock is tied to your awareness of the reportable incident.
Illustrative examples
These are illustrative and de-identified, to show where the line tends to fall. They are not a substitute for your delegate's judgement on a specific case.
Likely reportable
A resident living with dementia is found to be missing from a residential service. Their whereabouts are unknown, they are at risk, and staff contact police. This is an unexplained absence with reasonable grounds to report to police, likely Priority 1.
Likely reportable
A home-care worker arrives for a scheduled visit and the person is not there, has not been seen, cannot be contacted, and this is out of character in a way that raises a safety concern with reasonable grounds to report to police. Treat it as Priority 1.
Likely not this category
A person who directs their own care has chosen to go out and their absence is explained and consistent with their plan and capacity. There is no safety concern warranting police involvement. This is not an unexplained absence, though your own records should still reflect it.
Because this category runs on a 24-hour clock, the internal notification pathway matters. Every hour between a worker realising a person is missing and your delegate becoming aware is an hour off your reporting window. Capture the moment of awareness with a timestamp.
Primary source
This page is based on guidance published by the Aged Care Quality and Safety Commission (ACQSC) under the Aged Care Act 2024 and the Aged Care Rules 2025, in force from 1 November 2025.