Edit: Thanks everyone, really appreciate your advice.
Hi a couple of questions, I’ve searched here first and looked on internet, still just want to double check. We are from Australia, flying into Chiang Mai from Hanoi. We don’t need to apply for a visa, we can get 30 days on. Visa exemption is my understanding. If we want to do another 30 days, we leave the country and then can come back again on a visa exemption. As we plan to do a land crossing at the end of our first 30 days we won’t have proof of an exiting ticket, will they check this when we fly in? Any advice about what we should do in regards to exiting ticket or just leave it and hope we are not asked?
TLDR : Answer Summary
An Australian traveler is seeking advice on entering Thailand without a visa, utilizing a 30-day visa exemption upon arrival in Chiang Mai from Vietnam. They want to verify that they won't need to leave the country to obtain an additional 30 days and are concerned about providing proof of onward travel. Community responses suggest that it's possible to extend the initial 30 days at an immigration office instead of leaving the country. Additionally, there are mixed opinions on whether airlines will require proof of onward or return tickets, often advising to have a temporary or refundable ticket ready. General procedures for extending the visa and tips for dealing with immigration in Thailand are also discussed.