If a passports are accepted it should not create a problem for most foreigners/immigrants. And Thai passport doesn't look too different from others: https://en.wikipedia.org/wiki/Thai_passport guess an untrained worker will not spot a forgery but that's true for no matter which country's passport do you use and something like an US driving license looks easier to forge than Thai biometric passport.
> something like an US driving license looks easier to forge than Thai biometric passport
I'm not sure this is the right comparison, in general, although I agree with your point (below). I suspect that one benefit of accepting domestic driving licences as ID, but not most foreign non-passport documents, is due to familiarity. That's probably as important a factor in spotting forgeries as the security features embedded in the document, which aren't very useful if the person checking isn't familiar with an authentic version of the document.
In practice, I tend to agree that someone is likely to not be familiar with many driving licences, such as (in the US/Canada) those from distant or low-population US/Canadian states, provinces, or territories, or (in much of Europe) a smaller European country's driving licence or national ID card, so a foreign passport is far from the main concern.
Agreed. And even within a jurisdiction not everyone may be very familiar with domestic IDs. FinCEN just yesterday released a notice to financial institutions regarding the use of forged and legitimate US Passport Cards in connection with fraudulent or suspicious activity. The notice includes a litany of validity tests given that people just don't see these very often.
I have a US Passport Card that I present as my photo ID when asked, because I don't want my address presented to just anyone who might have a valid need to ask for ID. Federal employees look at it and waive me on, but outside that I get a mix of "I've never seen this" (and every time it's still been accepted) and a lot of careful scanning of the card.
