As I am elderly person , who finds it difficult in doing a visa application on line , I was just wondering if it is possible to do it all and send the lot to the Sydney embassy by post with a prepaid return envelope   .  I am able to download the application form no problem . So all I have to do is fill out the application form and staple photo on it , add financial statement from bank and enclose all this along with my passport , sending it all by Australia Post to Sydney Embassy , enclosing a return prepaid envelope so they send it all back to me. Any help appreciated thanks. ..................Regards Popa

The Sydney Consulate clearly states to upload application and wait for email before posting your passport so I would say no you can't 

 

However you can post application to Canberra Embassy which does not do online applications.

 

The Royal Thai Embassy, Canberra
111 Empire Circuit, Yarralumla ACT 2600, Australia

 

Guidelines here

https://canberra.thaiembassy.org/toursit-visa-category-tr/

 

Edited June 23, 20233 yr by Pattaya57

OP, you have good advice above.

Regards dealing with Sydney have you looked at the process.

It's not difficult. 

Perhaps someone could help you with the 4 step process.

 

https://sydney.thaiembassy.org/en/index