@Doug *******
I just got a new Passport in December in Australia when I went back for a visit….what Todd said is exactly correct, I just showed old and new passports to the Immigration Officer at the airport, no problems. Then I went to my Immigration Office to get my Extension of Stay stamps transferred to my new PP when I returned to my home, also you need to inform the TM30 section of your return and update your new PP with them (take note it’s is not Visa stamps being transferred as Todd always points out that they are Extensions of Stay🤣)……also you should take your new PP to your Bank to update them as well as they need to know when issuing your bank docs for proof of funds.