关于你说的如何证明配偶身份
在澳洲关于这个的法律定义很明确
Spouse
Your 'spouse' includes another person (whether of the same sex or opposite sex) who:
you were in a relationship with that was registered under a prescribed state or territory law,
although not legally married to you, lived with you on a genuine domestic basis in a relationship as a couple.
这个一般如果是真实存在的都不会难证明