The NSW companion animal act - says if your unregistered dog ends up at the pound you have to pay to get it registerd, plus the fine, plus the cost of keeping it at the pound... all at once - to get your dog back.
A pound near Newcastle - recently PTS a dog that the owner had repeatedly said they'd pay... and someone at the pound said they'd hold it till Monday but they PTS on the Friday. But this particular owner had been a repeat repeat offender... Not fair on the dog tho.
ACT has the best least kill results that I've seen across Australia. I think it must be hard on shelter staff - they must get so jaded with all the dogs that need homes that they give up trying to find the owners because it's so unrewarding - from owners who make promises but don't keep them, to owners that abuse them for asking for the cost of keeping the dog for them to the owners that just refuse to admit they own the dog (we sold it to someone else - haven't got their details microchip data never updated). Personally if I'd rehomed a dog and it showed up at the pound - if they called me - I'd claim it anyway - but I'm not completely skint.