But the VFS site doesn't specify any countries for the barcode separators. So how do we know if the US is exempt? I found the info on which countries require the TB test, but nothing on the barcode separators.
I’m confused - VFS has a separate website for each country. If you are applying from the US and there is no mention of barcode separators on the US VFS site, then you don’t need them.
Whether or not you need barcode separators is determined by VFS Global for the particular country where you are applying. However, things like English tests and TB tests are determined by UKVI and the countries that need to take them are published on the UKVI website.
As far as I know, the countries where you need barcode separators are ones where you submit your documents in person at the biometrics appointment, then the documents are handed back to you. In the US, you attend biometrics first at a US immigration centre and then mail the documents to UKVI... therefore barcode separators have never been needed for US applications.
The only place on the VFS website you should be looking is here, which is specifically for US applications:
https://www.vfsglobal.co.uk/us/en/how-to-applySent from my iPhone using Tapatalk