Originally Posted by
lin821
You skipped the following notation:
This online service is only for native citizens (of Taiwan) to use. For foreigner service please refer to FAQ.
And in the linked
FAQ entry,
Q: Is iTaiwan service available to foreign visitors?
A: [...] You can also use a native mobile phone number or a native prepaid card number to register a account for the use of iTaiwan service or register for a TPE-Free account to log onto iTaiwan service. [...]
I would say visitors are authorized to register for iTaiwan access with just a prepaid mobile number.
IIRC, when I registered for the service last year, nowhere during the registration process did it ask for my ID number.