No visa label will be put in your passport. On departure for Australia, airline staff will confirm that a valid visa for Australia is held. No forms need to be filled in. The ETA requires less information than a normal visa and there is no form to fill or label to stick in your passport. The whole process takes only a few minutes, if you are obtaining an ETA through an airline or their sales agent and can be done on the same screen and at the same time as airline reservations.
Approval comes direct from Australia with minimal delay.
Nationals of Taiwan who reside permanently in Taiwan, holders of Hong Kong Special Administrative Region passports and holders of British National Overseas passports, who reside permanently in Hong Kong, are eligible for ETA's. Applications from these people must be made in Taiwan or Hong Kong respectively. All visitors to Australia must hold a valid visa. Applications by persons currently living Vietnam, irrespective of the purpose of travel or period of stay sought, may be lodged at either Visa Office. Vietnamese nationals must apply using an application form 48R and one passport size photograph and a processing fee.