When you arrive here you could take a health check up package in one of the hospitals or clinic. If results would show a chronic disease, there is a chance for you to apply for DTV soft power medical treatment. You can DM me if you have questions.
I was able to open an account at this Bangkok Bank on Non O Visa. Bring e-visa copy, TM30, passport , Driver’s License from your country. Dress up, not shorts and shirts. Bangkok Bank
I am not sure this is the answer you are seeking. If you have started the online application but decided you don't want to proceed and cancel it, the system will automatically remove/delete incomplete application after 14 days. See screenshot below.
I hope you are doing your research before going to HCM. Check if you need a VISA to enter HCM. The entry stamp is the stamp on your passport by the Immigration Officer at the airport. You can only apply online while in HCM and your entry stamp at the airport is your proof that you are in the country. I urge you to search the posts in this Group as your payment is non refundable.
I can share my experience. After I submitted DTV application, status “pending documents review” 2nd day pending processing for approval” 4th day (not a weekend) received an email DTV visa approved. Just my opinion, it will most likely will be approved” based on my experience.
When I applied this week in Vietnam, I submitted two sets - set for the current month (Oct 17) and September month-end statement. I included September month-end to prove historical link to the Oct 17. Also, the September would have the more official format - full Bank Name, address, account number etc. In both of these statements I made a summary of the balances and the equivalent in Baht. This would make it easier for them to check the math. Also I only did a screenshots and combine them in 1 pdf as the e-visa system has a file limit for every upload.