It's NOT perfectly legal.
It is always perfectly legal to provide one's actual current residence address on the 4473.
That is true even if that actual residence address does not match what is on one's government ID--the buyer isn't breaking any laws as long as the current residence is provided on the form.
HOWEVER, the dealer won't (can't legally) complete the transaction without proof that the listed residence is correct. (And that it fulfills any other requirements set forth in Federal law.)
JohnKSa said:
...the dealer should have requested that you provide alternative documentation...
The dealer should have REQUIRED the alternate documentation.
It should go without saying that if the dealer
requests information in the course of a sale that providing it is
required. Whether it does or doesn't, that's certainly what I meant and you are correct.
I've never been asked to show proof of residence... Only proof of ID from my state of residence.
The form itself
requests requires that the purchaser provides his/her actual current residence address. If a purchaser were to provide an address that is other than his/her actual current residence address (which can not be a POB address) then that purchaser would be committing a felony by lying on the 4473.
If you were to provide your actual current residence address and it is different from the address listed on your government issued ID then you would not be breaking any laws. HOWEVER, if the dealer were to complete the transaction without
asking for requiring additional qualifying documentation that verifies the listed address is correct then the dealer would be breaking the law.