how to check resident return visa expiry

The Australia Resident Return visa, which falls under the subclasses 155 and 157, is granted when the travel facility on the first permanent visa is expired or is going to expire and you need to hold back the permanent resident status, as well as travel abroad. The first permanent visa, however, allows you to travel overseas for 5 years and after that, you should possess an Australia Resident Return visa to retain your eligibility of permanent residency for Australia citizenship. To become eligible for the Resident Return visa, you must be:

A permanent resident of Australia. A permanent resident earlier and your last PR visa is still valid. An Australian citizen earlier and lost or disowned your citizenship.