BTW the TIN is just a string of text/numbers. If you know the format, you donāt even need to obtain it for real, just create one yourself.
For example, the Italian TIN (codice fiscale) can be created on many websites. One such websites:
Calcolo Codice Fiscale Estero - ProfessioneGiustizia.it
There are ways to check if the person is really registered with the tax office, but rarely banks go through such hassle.
That works for a codice fiscale because there is a formula for creating one based on your name and place of birth, etc. You can predictably invent one and it will be true to the one that is issued from AdE. This is not true for a US SSN or Canadian SIN. Though those have some correlation to place of birth, itās not reliable nor predictable. The uses are a bit different across the three, as well, so you can run into pitfalls.
The CF is ideal for this sort of thing, since you know how to make exactly what yours would be, there is little risk of making another personās by mistake, and the way it is used they donāt check if itās actually assigned. On the other hand, itās free to get an actual one just by writing a letter and a form to the local Italian consulate. Youāll have it in a week, most times.
A SSN is a different matter. Itās almost certain to be flagged somewhere if invalid, but there is little the US government can or will do about it. Legally, itās not supposed to be used for identification or anything but social security tax withholdings. Practically, it is misused that way and is easily checked against databases for validity, but that legal gray area means there is little legal remedy for misusing one outside of tax enforcement.
SINs appear to have limited use, although Iām a bit new to this one. Itās more like an Italian Tessera Sanitaria. You provide one to a company if youāre employed by them and there is probably some self-employment usage, and it allows access to socialized health care. It does not seem to be used like a CF or SSN for random things like leases or car rentals.
Other tax IDs, like Armenian INN, Iāve not used outside of company formation and tax reporting.
The CF formula is on the Wikipedia page should one be curious.
en.wikipedia.org