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What should I do if I encounter a 403 error when trying to upload documents for my visa application in Thailand?

Document Upload Issues Visa Application 403 Error Troubleshooting Thai Immigration System Technical Glitches Expat Experiences

Jul 31, 2025

3 days ago

Denise *********

ORIGINAL POSTER

I've got all my documents ready, merged and compressed, covering letters etc. but I can't upload them into the system. I've entered all my information in the first 3 pages, double checked it, but when I go to upload 3,4 and 5 - current location, proof of finance and employer details, I can't upload the files. It just keeps giving me this 403 error message. Has anyone else had this? Is there something obvious I'm doing wrong? Thanks for any help.

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TLDR : Answer Summary

A user experienced a 403 error while trying to upload required documents for their visa application in Thailand. Despite verifying their document format and size, they were unable to upload files related to current location, proof of finance, and employer details. After several attempts, including checking file sizes and clearing browser cache, the user finally succeeded after 24 hours. Community suggestions included ensuring files are in PDF format, switching browsers, disabling VPNs, and logging out and back in to the system.

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Denise *********

ORIGINAL POSTER

Cheers everyone, I just kept persisting and finally it worked. Documents were merged and compressed (about 1.5 MB), I wasn't using a VPN, cleared cookies, refreshed....the lot. But for some reason, 24 hours later it just worked.

I guess my only advice is, there are glitches, so just keep trying.

Thanks to everyone with advice, much appreciated.

2 days ago

Bradley ********

Disable vpn if your using one

3 days ago

Wannikea *********

Log out and login again.

3 days ago

Denise *********

ORIGINAL POSTER

Yea, I've done that about 20 times now, I'm running out of ideas. Weird that the 403 error disappeared and let me upload to 2 categories, but still won't work for 3. Current location. Just logged out and back in again now, but still won't upload. Maybe I'll just try again tomorrow, I've refreshed and cleared everything I can think of.

3 days ago

Reply to

Denise *********

ORIGINAL POSTER

Thanks, I cleared all browsing data, cookies and refreshed the page (as per helpful comments above) It now allowed me to upload 4 and 5, finances and employer details, but it still won't allow me to upload (or drag and drop #3 - my summary and current location) so I'll keep trying to clear up, refresh etc and see if it will have a change of heart.

3 days ago

Denise *********

ORIGINAL POSTER

I've merged and compressed my pdf's so they're all under 3 MB. It's been like this for 2 days and I don't know what to do next. I've messaged them, but no answer.

3 days ago

Derek *****

If you’re using a browser other than Chrome, try switching. I find many Thai sites don’t work well with anything else.

3 days ago

Denise *********

ORIGINAL POSTER

I'm using chrome

3 days ago

Reply to

Denise *********

Mercy *********

Are your files all PDF and less than 3mb? I'd start there