How can I prove my daughter's location for a DTV application if she has no ID and isn't stamped on re-entry?

The user is applying for a DTV visa to have their daughter join them in Thailand but is facing challenges in proving her location due to the absence of a passport stamp or ID card. They have submitted various documents to the Sydney embassy, including a bank statement, driver's license, and a ticket, and received advice in the comments on additional evidence types like a statutory declaration, bank statements showing usage, and requests for passenger movement records from Australia's Department of Home Affairs.