Just because you say it is true, doesn't make it true. As an example, my drivers license had a mispelling in my name. Never had a problem with the bank.
Perhaps they don't need the NAME, just the ID number.
As far as your checks, the "authorized signature" line is but an example of what I am trying to say here. Your proper name is not the name written on your checkbook, is it?
Actually, it is factually correct to say that punctuation, spelling, capitalization, and grammar are important in law. For example, an alleged violation of law charged to the all-caps name can be abated with the primary cause being misnomer.
I am not in receipt of any evidence that capitalization is universally unimportant in law, but I am again pointing you to evidence indicating that it
is important and will await your providing evidence that disputes the following line of reasoning:
If, for instance, one attempts to file articles of incorporation in the office of a Secretary of State of a State, if the exact title of the corporation - down to every jot and tittle - is not exactly the same each and every time the corporation is referenced in the documents to be filed, the Secretary of State will refuse to file the papers. This is because each time the name of the corporation is referenced it must be set forth identically in order to express the same legal entity. The tiniest difference in the name of the corporation identifies an entirely different legal person.
It is therefore an eminently valid, and possibly crucial, question as to why governments, governmental courts, and agencies purporting to exist (in some undefined, unproved manner) within the jurisdiction of "this state" insist on always capitalizing every letter in a proper name.
There are no official or unofficial English grammar style manuals or reference publications that recognize the use of all caps when writing a proper name. To do so is by fiat, within and out of an undisclosed jurisdiction by unknown people for unrevealed reasons, by juristic license of arbitrary presumption not based on fact. The authors of the process unilaterally create legal fictions for their own reasons and set about to get us to take the bait, fall for the deceit.
I would rather not cointinue quoting this source, but would prefer that you read it in its entirety because it provides definitive proof that capitalization is important in law, at least sometimes, and like I stated above, you can test this yourself. OK, now for your convenience I will quote this definitive proof and you tell me if you can find a counterexample:
Why won't they use "The State of Texas" or "John Doe" in their courts or on Driver's Licenses? What stops them from doing this? Obviously, there is a reason for using the all-caps names since they are very capable of writing proper names just as their own official style manual states. The reason behind "legal fictions" is found within the definitions as cited above.